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Subtract 42/64 from 3/7

3/7 - 42/64 is -51/224.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 64 is 448

    Next, find the equivalent fraction of both fractional numbers with denominator 448
  2. For the 1st fraction, since 7 × 64 = 448,
    3/7 = 3 × 64/7 × 64 = 192/448
  3. Likewise, for the 2nd fraction, since 64 × 7 = 448,
    42/64 = 42 × 7/64 × 7 = 294/448
  4. Subtract the two like fractions:
    192/448 - 294/448 = 192 - 294/448 = -102/448
  5. After reducing the fraction, the answer is -51/224

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