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Subtract 81/56 from 8/7

1st number: 1 1/7, 2nd number: 1 25/56

8/7 - 81/56 is -17/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 56 is 56
  2. For the 1st fraction, since 7 × 8 = 56,
    8/7 = 8 × 8/7 × 8 = 64/56
  3. Likewise, for the 2nd fraction, since 56 × 1 = 56,
    81/56 = 81 × 1/56 × 1 = 81/56
  4. Subtract the two fractions:
    64/56 - 81/56 = 64 - 81/56 = -17/56

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