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Subtract 81/56 from 56/21

1st number: 2 14/21, 2nd number: 1 25/56

56/21 - 81/56 is 205/168.

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,
    56/21 = 56 × 8/21 × 8 = 448/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    81/56 = 81 × 3/56 × 3 = 243/168
  4. Subtract the two like fractions:
    448/168 - 243/168 = 448 - 243/168 = 205/168
  5. In mixed form: 137/168

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