0.000 999 999 999 999 999 803 976 247 214 620 797 65 Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard

Convert decimal 0.000 999 999 999 999 999 803 976 247 214 620 797 65(10) to 64 bit double precision IEEE 754 binary floating point representation standard (1 bit for sign, 11 bits for exponent, 52 bits for mantissa)

What are the steps to convert decimal number
0.000 999 999 999 999 999 803 976 247 214 620 797 65(10) to 64 bit double precision IEEE 754 binary floating point representation (1 bit for sign, 11 bits for exponent, 52 bits for mantissa)

1. First, convert to binary (in base 2) the integer part: 0.
Divide the number repeatedly by 2.

Keep track of each remainder.

We stop when we get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 0 ÷ 2 = 0 + 0;

2. Construct the base 2 representation of the integer part of the number.

Take all the remainders starting from the bottom of the list constructed above.

0(10) =

0(2)


3. Convert to binary (base 2) the fractional part: 0.000 999 999 999 999 999 803 976 247 214 620 797 65.

Multiply it repeatedly by 2.

Keep track of each integer part of the results.

Stop when we get a fractional part that is equal to zero.


  • #) multiplying = integer + fractional part;
  • 1) 0.000 999 999 999 999 999 803 976 247 214 620 797 65 × 2 = 0 + 0.001 999 999 999 999 999 607 952 494 429 241 595 3;
  • 2) 0.001 999 999 999 999 999 607 952 494 429 241 595 3 × 2 = 0 + 0.003 999 999 999 999 999 215 904 988 858 483 190 6;
  • 3) 0.003 999 999 999 999 999 215 904 988 858 483 190 6 × 2 = 0 + 0.007 999 999 999 999 998 431 809 977 716 966 381 2;
  • 4) 0.007 999 999 999 999 998 431 809 977 716 966 381 2 × 2 = 0 + 0.015 999 999 999 999 996 863 619 955 433 932 762 4;
  • 5) 0.015 999 999 999 999 996 863 619 955 433 932 762 4 × 2 = 0 + 0.031 999 999 999 999 993 727 239 910 867 865 524 8;
  • 6) 0.031 999 999 999 999 993 727 239 910 867 865 524 8 × 2 = 0 + 0.063 999 999 999 999 987 454 479 821 735 731 049 6;
  • 7) 0.063 999 999 999 999 987 454 479 821 735 731 049 6 × 2 = 0 + 0.127 999 999 999 999 974 908 959 643 471 462 099 2;
  • 8) 0.127 999 999 999 999 974 908 959 643 471 462 099 2 × 2 = 0 + 0.255 999 999 999 999 949 817 919 286 942 924 198 4;
  • 9) 0.255 999 999 999 999 949 817 919 286 942 924 198 4 × 2 = 0 + 0.511 999 999 999 999 899 635 838 573 885 848 396 8;
  • 10) 0.511 999 999 999 999 899 635 838 573 885 848 396 8 × 2 = 1 + 0.023 999 999 999 999 799 271 677 147 771 696 793 6;
  • 11) 0.023 999 999 999 999 799 271 677 147 771 696 793 6 × 2 = 0 + 0.047 999 999 999 999 598 543 354 295 543 393 587 2;
  • 12) 0.047 999 999 999 999 598 543 354 295 543 393 587 2 × 2 = 0 + 0.095 999 999 999 999 197 086 708 591 086 787 174 4;
  • 13) 0.095 999 999 999 999 197 086 708 591 086 787 174 4 × 2 = 0 + 0.191 999 999 999 998 394 173 417 182 173 574 348 8;
  • 14) 0.191 999 999 999 998 394 173 417 182 173 574 348 8 × 2 = 0 + 0.383 999 999 999 996 788 346 834 364 347 148 697 6;
  • 15) 0.383 999 999 999 996 788 346 834 364 347 148 697 6 × 2 = 0 + 0.767 999 999 999 993 576 693 668 728 694 297 395 2;
  • 16) 0.767 999 999 999 993 576 693 668 728 694 297 395 2 × 2 = 1 + 0.535 999 999 999 987 153 387 337 457 388 594 790 4;
  • 17) 0.535 999 999 999 987 153 387 337 457 388 594 790 4 × 2 = 1 + 0.071 999 999 999 974 306 774 674 914 777 189 580 8;
  • 18) 0.071 999 999 999 974 306 774 674 914 777 189 580 8 × 2 = 0 + 0.143 999 999 999 948 613 549 349 829 554 379 161 6;
  • 19) 0.143 999 999 999 948 613 549 349 829 554 379 161 6 × 2 = 0 + 0.287 999 999 999 897 227 098 699 659 108 758 323 2;
  • 20) 0.287 999 999 999 897 227 098 699 659 108 758 323 2 × 2 = 0 + 0.575 999 999 999 794 454 197 399 318 217 516 646 4;
  • 21) 0.575 999 999 999 794 454 197 399 318 217 516 646 4 × 2 = 1 + 0.151 999 999 999 588 908 394 798 636 435 033 292 8;
  • 22) 0.151 999 999 999 588 908 394 798 636 435 033 292 8 × 2 = 0 + 0.303 999 999 999 177 816 789 597 272 870 066 585 6;
  • 23) 0.303 999 999 999 177 816 789 597 272 870 066 585 6 × 2 = 0 + 0.607 999 999 998 355 633 579 194 545 740 133 171 2;
  • 24) 0.607 999 999 998 355 633 579 194 545 740 133 171 2 × 2 = 1 + 0.215 999 999 996 711 267 158 389 091 480 266 342 4;
  • 25) 0.215 999 999 996 711 267 158 389 091 480 266 342 4 × 2 = 0 + 0.431 999 999 993 422 534 316 778 182 960 532 684 8;
  • 26) 0.431 999 999 993 422 534 316 778 182 960 532 684 8 × 2 = 0 + 0.863 999 999 986 845 068 633 556 365 921 065 369 6;
  • 27) 0.863 999 999 986 845 068 633 556 365 921 065 369 6 × 2 = 1 + 0.727 999 999 973 690 137 267 112 731 842 130 739 2;
  • 28) 0.727 999 999 973 690 137 267 112 731 842 130 739 2 × 2 = 1 + 0.455 999 999 947 380 274 534 225 463 684 261 478 4;
  • 29) 0.455 999 999 947 380 274 534 225 463 684 261 478 4 × 2 = 0 + 0.911 999 999 894 760 549 068 450 927 368 522 956 8;
  • 30) 0.911 999 999 894 760 549 068 450 927 368 522 956 8 × 2 = 1 + 0.823 999 999 789 521 098 136 901 854 737 045 913 6;
  • 31) 0.823 999 999 789 521 098 136 901 854 737 045 913 6 × 2 = 1 + 0.647 999 999 579 042 196 273 803 709 474 091 827 2;
  • 32) 0.647 999 999 579 042 196 273 803 709 474 091 827 2 × 2 = 1 + 0.295 999 999 158 084 392 547 607 418 948 183 654 4;
  • 33) 0.295 999 999 158 084 392 547 607 418 948 183 654 4 × 2 = 0 + 0.591 999 998 316 168 785 095 214 837 896 367 308 8;
  • 34) 0.591 999 998 316 168 785 095 214 837 896 367 308 8 × 2 = 1 + 0.183 999 996 632 337 570 190 429 675 792 734 617 6;
  • 35) 0.183 999 996 632 337 570 190 429 675 792 734 617 6 × 2 = 0 + 0.367 999 993 264 675 140 380 859 351 585 469 235 2;
  • 36) 0.367 999 993 264 675 140 380 859 351 585 469 235 2 × 2 = 0 + 0.735 999 986 529 350 280 761 718 703 170 938 470 4;
  • 37) 0.735 999 986 529 350 280 761 718 703 170 938 470 4 × 2 = 1 + 0.471 999 973 058 700 561 523 437 406 341 876 940 8;
  • 38) 0.471 999 973 058 700 561 523 437 406 341 876 940 8 × 2 = 0 + 0.943 999 946 117 401 123 046 874 812 683 753 881 6;
  • 39) 0.943 999 946 117 401 123 046 874 812 683 753 881 6 × 2 = 1 + 0.887 999 892 234 802 246 093 749 625 367 507 763 2;
  • 40) 0.887 999 892 234 802 246 093 749 625 367 507 763 2 × 2 = 1 + 0.775 999 784 469 604 492 187 499 250 735 015 526 4;
  • 41) 0.775 999 784 469 604 492 187 499 250 735 015 526 4 × 2 = 1 + 0.551 999 568 939 208 984 374 998 501 470 031 052 8;
  • 42) 0.551 999 568 939 208 984 374 998 501 470 031 052 8 × 2 = 1 + 0.103 999 137 878 417 968 749 997 002 940 062 105 6;
  • 43) 0.103 999 137 878 417 968 749 997 002 940 062 105 6 × 2 = 0 + 0.207 998 275 756 835 937 499 994 005 880 124 211 2;
  • 44) 0.207 998 275 756 835 937 499 994 005 880 124 211 2 × 2 = 0 + 0.415 996 551 513 671 874 999 988 011 760 248 422 4;
  • 45) 0.415 996 551 513 671 874 999 988 011 760 248 422 4 × 2 = 0 + 0.831 993 103 027 343 749 999 976 023 520 496 844 8;
  • 46) 0.831 993 103 027 343 749 999 976 023 520 496 844 8 × 2 = 1 + 0.663 986 206 054 687 499 999 952 047 040 993 689 6;
  • 47) 0.663 986 206 054 687 499 999 952 047 040 993 689 6 × 2 = 1 + 0.327 972 412 109 374 999 999 904 094 081 987 379 2;
  • 48) 0.327 972 412 109 374 999 999 904 094 081 987 379 2 × 2 = 0 + 0.655 944 824 218 749 999 999 808 188 163 974 758 4;
  • 49) 0.655 944 824 218 749 999 999 808 188 163 974 758 4 × 2 = 1 + 0.311 889 648 437 499 999 999 616 376 327 949 516 8;
  • 50) 0.311 889 648 437 499 999 999 616 376 327 949 516 8 × 2 = 0 + 0.623 779 296 874 999 999 999 232 752 655 899 033 6;
  • 51) 0.623 779 296 874 999 999 999 232 752 655 899 033 6 × 2 = 1 + 0.247 558 593 749 999 999 998 465 505 311 798 067 2;
  • 52) 0.247 558 593 749 999 999 998 465 505 311 798 067 2 × 2 = 0 + 0.495 117 187 499 999 999 996 931 010 623 596 134 4;
  • 53) 0.495 117 187 499 999 999 996 931 010 623 596 134 4 × 2 = 0 + 0.990 234 374 999 999 999 993 862 021 247 192 268 8;
  • 54) 0.990 234 374 999 999 999 993 862 021 247 192 268 8 × 2 = 1 + 0.980 468 749 999 999 999 987 724 042 494 384 537 6;
  • 55) 0.980 468 749 999 999 999 987 724 042 494 384 537 6 × 2 = 1 + 0.960 937 499 999 999 999 975 448 084 988 769 075 2;
  • 56) 0.960 937 499 999 999 999 975 448 084 988 769 075 2 × 2 = 1 + 0.921 874 999 999 999 999 950 896 169 977 538 150 4;
  • 57) 0.921 874 999 999 999 999 950 896 169 977 538 150 4 × 2 = 1 + 0.843 749 999 999 999 999 901 792 339 955 076 300 8;
  • 58) 0.843 749 999 999 999 999 901 792 339 955 076 300 8 × 2 = 1 + 0.687 499 999 999 999 999 803 584 679 910 152 601 6;
  • 59) 0.687 499 999 999 999 999 803 584 679 910 152 601 6 × 2 = 1 + 0.374 999 999 999 999 999 607 169 359 820 305 203 2;
  • 60) 0.374 999 999 999 999 999 607 169 359 820 305 203 2 × 2 = 0 + 0.749 999 999 999 999 999 214 338 719 640 610 406 4;
  • 61) 0.749 999 999 999 999 999 214 338 719 640 610 406 4 × 2 = 1 + 0.499 999 999 999 999 998 428 677 439 281 220 812 8;
  • 62) 0.499 999 999 999 999 998 428 677 439 281 220 812 8 × 2 = 0 + 0.999 999 999 999 999 996 857 354 878 562 441 625 6;

We didn't get any fractional part that was equal to zero. But we had enough iterations (over Mantissa limit) and at least one integer that was different from zero => FULL STOP (Losing precision - the converted number we get in the end will be just a very good approximation of the initial one).


4. Construct the base 2 representation of the fractional part of the number.

Take all the integer parts of the multiplying operations, starting from the top of the constructed list above:


0.000 999 999 999 999 999 803 976 247 214 620 797 65(10) =

0.0000 0000 0100 0001 1000 1001 0011 0111 0100 1011 1100 0110 1010 0111 1110 10(2)

5. Positive number before normalization:

0.000 999 999 999 999 999 803 976 247 214 620 797 65(10) =

0.0000 0000 0100 0001 1000 1001 0011 0111 0100 1011 1100 0110 1010 0111 1110 10(2)

6. Normalize the binary representation of the number.

Shift the decimal mark 10 positions to the right, so that only one non zero digit remains to the left of it:


0.000 999 999 999 999 999 803 976 247 214 620 797 65(10) =

0.0000 0000 0100 0001 1000 1001 0011 0111 0100 1011 1100 0110 1010 0111 1110 10(2) =

0.0000 0000 0100 0001 1000 1001 0011 0111 0100 1011 1100 0110 1010 0111 1110 10(2) × 20 =

1.0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010(2) × 2-10


7. Up to this moment, there are the following elements that would feed into the 64 bit double precision IEEE 754 binary floating point representation:

Sign 0 (a positive number)

Exponent (unadjusted): -10

Mantissa (not normalized):
1.0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010


8. Adjust the exponent.

Use the 11 bit excess/bias notation:


Exponent (adjusted) =

Exponent (unadjusted) + 2(11-1) - 1 =

-10 + 2(11-1) - 1 =

(-10 + 1 023)(10) =

1 013(10)


9. Convert the adjusted exponent from the decimal (base 10) to 11 bit binary.

Use the same technique of repeatedly dividing by 2:


  • division = quotient + remainder;
  • 1 013 ÷ 2 = 506 + 1;
  • 506 ÷ 2 = 253 + 0;
  • 253 ÷ 2 = 126 + 1;
  • 126 ÷ 2 = 63 + 0;
  • 63 ÷ 2 = 31 + 1;
  • 31 ÷ 2 = 15 + 1;
  • 15 ÷ 2 = 7 + 1;
  • 7 ÷ 2 = 3 + 1;
  • 3 ÷ 2 = 1 + 1;
  • 1 ÷ 2 = 0 + 1;

10. Construct the base 2 representation of the adjusted exponent.

Take all the remainders starting from the bottom of the list constructed above.


Exponent (adjusted) =

1013(10) =

011 1111 0101(2)


11. Normalize the mantissa.

a) Remove the leading (the leftmost) bit, since it's allways 1, and the decimal point, if the case.

b) Adjust its length to 52 bits, only if necessary (not the case here).


Mantissa (normalized) =

1. 0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010 =

0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010


12. The three elements that make up the number's 64 bit double precision IEEE 754 binary floating point representation:

Sign (1 bit) =
0 (a positive number)

Exponent (11 bits) =
011 1111 0101

Mantissa (52 bits) =
0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010


Decimal number 0.000 999 999 999 999 999 803 976 247 214 620 797 65 converted to 64 bit double precision IEEE 754 binary floating point representation:

0 - 011 1111 0101 - 0000 0110 0010 0100 1101 1101 0010 1111 0001 1010 1001 1111 1010

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How to convert numbers from the decimal system (base ten) to 64 bit double precision IEEE 754 binary floating point standard

Follow the steps below to convert a base 10 decimal number to 64 bit double precision IEEE 754 binary floating point:

  • 1. If the number to be converted is negative, start with its the positive version.
  • 2. First convert the integer part. Divide repeatedly by 2 the positive representation of the integer number that is to be converted to binary, until we get a quotient that is equal to zero, keeping track of each remainder.
  • 3. Construct the base 2 representation of the positive integer part of the number, by taking all the remainders from the previous operations, starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Then convert the fractional part. Multiply the number repeatedly by 2, until we get a fractional part that is equal to zero, keeping track of each integer part of the results.
  • 5. Construct the base 2 representation of the fractional part of the number, by taking all the integer parts of the multiplying operations, starting from the top of the list constructed above (they should appear in the binary representation, from left to right, in the order they have been calculated).
  • 6. Normalize the binary representation of the number, shifting the decimal mark (the decimal point) "n" positions either to the left, or to the right, so that only one non zero digit remains to the left of the decimal mark.
  • 7. Adjust the exponent in 11 bit excess/bias notation and then convert it from decimal (base 10) to 11 bit binary, by using the same technique of repeatedly dividing by 2, as shown above:
    Exponent (adjusted) = Exponent (unadjusted) + 2(11-1) - 1
  • 8. Normalize mantissa, remove the leading (leftmost) bit, since it's allways '1' (and the decimal mark, if the case) and adjust its length to 52 bits, either by removing the excess bits from the right (losing precision...) or by adding extra bits set on '0' to the right.
  • 9. Sign (it takes 1 bit) is either 1 for a negative or 0 for a positive number.

Example: convert the negative number -31.640 215 from the decimal system (base ten) to 64 bit double precision IEEE 754 binary floating point:

  • 1. Start with the positive version of the number:

    |-31.640 215| = 31.640 215

  • 2. First convert the integer part, 31. Divide it repeatedly by 2, keeping track of each remainder, until we get a quotient that is equal to zero:
    • division = quotient + remainder;
    • 31 ÷ 2 = 15 + 1;
    • 15 ÷ 2 = 7 + 1;
    • 7 ÷ 2 = 3 + 1;
    • 3 ÷ 2 = 1 + 1;
    • 1 ÷ 2 = 0 + 1;
    • We have encountered a quotient that is ZERO => FULL STOP
  • 3. Construct the base 2 representation of the integer part of the number by taking all the remainders of the previous dividing operations, starting from the bottom of the list constructed above:

    31(10) = 1 1111(2)

  • 4. Then, convert the fractional part, 0.640 215. Multiply repeatedly by 2, keeping track of each integer part of the results, until we get a fractional part that is equal to zero:
    • #) multiplying = integer + fractional part;
    • 1) 0.640 215 × 2 = 1 + 0.280 43;
    • 2) 0.280 43 × 2 = 0 + 0.560 86;
    • 3) 0.560 86 × 2 = 1 + 0.121 72;
    • 4) 0.121 72 × 2 = 0 + 0.243 44;
    • 5) 0.243 44 × 2 = 0 + 0.486 88;
    • 6) 0.486 88 × 2 = 0 + 0.973 76;
    • 7) 0.973 76 × 2 = 1 + 0.947 52;
    • 8) 0.947 52 × 2 = 1 + 0.895 04;
    • 9) 0.895 04 × 2 = 1 + 0.790 08;
    • 10) 0.790 08 × 2 = 1 + 0.580 16;
    • 11) 0.580 16 × 2 = 1 + 0.160 32;
    • 12) 0.160 32 × 2 = 0 + 0.320 64;
    • 13) 0.320 64 × 2 = 0 + 0.641 28;
    • 14) 0.641 28 × 2 = 1 + 0.282 56;
    • 15) 0.282 56 × 2 = 0 + 0.565 12;
    • 16) 0.565 12 × 2 = 1 + 0.130 24;
    • 17) 0.130 24 × 2 = 0 + 0.260 48;
    • 18) 0.260 48 × 2 = 0 + 0.520 96;
    • 19) 0.520 96 × 2 = 1 + 0.041 92;
    • 20) 0.041 92 × 2 = 0 + 0.083 84;
    • 21) 0.083 84 × 2 = 0 + 0.167 68;
    • 22) 0.167 68 × 2 = 0 + 0.335 36;
    • 23) 0.335 36 × 2 = 0 + 0.670 72;
    • 24) 0.670 72 × 2 = 1 + 0.341 44;
    • 25) 0.341 44 × 2 = 0 + 0.682 88;
    • 26) 0.682 88 × 2 = 1 + 0.365 76;
    • 27) 0.365 76 × 2 = 0 + 0.731 52;
    • 28) 0.731 52 × 2 = 1 + 0.463 04;
    • 29) 0.463 04 × 2 = 0 + 0.926 08;
    • 30) 0.926 08 × 2 = 1 + 0.852 16;
    • 31) 0.852 16 × 2 = 1 + 0.704 32;
    • 32) 0.704 32 × 2 = 1 + 0.408 64;
    • 33) 0.408 64 × 2 = 0 + 0.817 28;
    • 34) 0.817 28 × 2 = 1 + 0.634 56;
    • 35) 0.634 56 × 2 = 1 + 0.269 12;
    • 36) 0.269 12 × 2 = 0 + 0.538 24;
    • 37) 0.538 24 × 2 = 1 + 0.076 48;
    • 38) 0.076 48 × 2 = 0 + 0.152 96;
    • 39) 0.152 96 × 2 = 0 + 0.305 92;
    • 40) 0.305 92 × 2 = 0 + 0.611 84;
    • 41) 0.611 84 × 2 = 1 + 0.223 68;
    • 42) 0.223 68 × 2 = 0 + 0.447 36;
    • 43) 0.447 36 × 2 = 0 + 0.894 72;
    • 44) 0.894 72 × 2 = 1 + 0.789 44;
    • 45) 0.789 44 × 2 = 1 + 0.578 88;
    • 46) 0.578 88 × 2 = 1 + 0.157 76;
    • 47) 0.157 76 × 2 = 0 + 0.315 52;
    • 48) 0.315 52 × 2 = 0 + 0.631 04;
    • 49) 0.631 04 × 2 = 1 + 0.262 08;
    • 50) 0.262 08 × 2 = 0 + 0.524 16;
    • 51) 0.524 16 × 2 = 1 + 0.048 32;
    • 52) 0.048 32 × 2 = 0 + 0.096 64;
    • 53) 0.096 64 × 2 = 0 + 0.193 28;
    • We didn't get any fractional part that was equal to zero. But we had enough iterations (over Mantissa limit = 52) and at least one integer part that was different from zero => FULL STOP (losing precision...).
  • 5. Construct the base 2 representation of the fractional part of the number, by taking all the integer parts of the previous multiplying operations, starting from the top of the constructed list above:

    0.640 215(10) = 0.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2)

  • 6. Summarizing - the positive number before normalization:

    31.640 215(10) = 1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2)

  • 7. Normalize the binary representation of the number, shifting the decimal mark 4 positions to the left so that only one non-zero digit stays to the left of the decimal mark:

    31.640 215(10) =
    1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) =
    1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) × 20 =
    1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) × 24

  • 8. Up to this moment, there are the following elements that would feed into the 64 bit double precision IEEE 754 binary floating point representation:

    Sign: 1 (a negative number)

    Exponent (unadjusted): 4

    Mantissa (not-normalized): 1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0

  • 9. Adjust the exponent in 11 bit excess/bias notation and then convert it from decimal (base 10) to 11 bit binary (base 2), by using the same technique of repeatedly dividing it by 2, as shown above:

    Exponent (adjusted) = Exponent (unadjusted) + 2(11-1) - 1 = (4 + 1023)(10) = 1027(10) =
    100 0000 0011(2)

  • 10. Normalize mantissa, remove the leading (leftmost) bit, since it's allways '1' (and the decimal sign) and adjust its length to 52 bits, by removing the excess bits, from the right (losing precision...):

    Mantissa (not-normalized): 1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0

    Mantissa (normalized): 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100

  • Conclusion:

    Sign (1 bit) = 1 (a negative number)

    Exponent (8 bits) = 100 0000 0011

    Mantissa (52 bits) = 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100

  • Number -31.640 215, converted from decimal system (base 10) to 64 bit double precision IEEE 754 binary floating point =
    1 - 100 0000 0011 - 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100