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Subtract 21/64 from 42/15

1st number: 2 12/15, 2nd number: 21/64

42/15 - 21/64 is 791/320.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 64 is 960

    Next, find the equivalent fraction of both fractional numbers with denominator 960
  2. For the 1st fraction, since 15 × 64 = 960,
    42/15 = 42 × 64/15 × 64 = 2688/960
  3. Likewise, for the 2nd fraction, since 64 × 15 = 960,
    21/64 = 21 × 15/64 × 15 = 315/960
  4. Subtract the two like fractions:
    2688/960 - 315/960 = 2688 - 315/960 = 2373/960
  5. After reducing the fraction, the answer is 791/320
  6. In mixed form: 2151/320

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