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Subtract 5/21 from 3/56

3/56 - 5/21 is -31/168.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 56 × 3 = 168,
    3/56 = 3 × 3/56 × 3 = 9/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    5/21 = 5 × 8/21 × 8 = 40/168
  4. Subtract the two like fractions:
    9/168 - 40/168 = 9 - 40/168 = -31/168

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