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Subtract 15/10 from 21/64

1st number: 21/64, 2nd number: 1 5/10

21/64 - 15/10 is -75/64.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 64 and 10 is 320

    Next, find the equivalent fraction of both fractional numbers with denominator 320
  2. For the 1st fraction, since 64 × 5 = 320,
    21/64 = 21 × 5/64 × 5 = 105/320
  3. Likewise, for the 2nd fraction, since 10 × 32 = 320,
    15/10 = 15 × 32/10 × 32 = 480/320
  4. Subtract the two like fractions:
    105/320 - 480/320 = 105 - 480/320 = -375/320
  5. After reducing the fraction, the answer is -75/64

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