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Subtract 63/56 from 5/21

1st number: 5/21, 2nd number: 1 7/56

5/21 - 63/56 is -149/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 56 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    5/21 = 5 × 8/21 × 8 = 40/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    63/56 = 63 × 3/56 × 3 = 189/168
  4. Subtract the two like fractions:
    40/168 - 189/168 = 40 - 189/168 = -149/168

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