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Subtract 81/56 from 42/20

1st number: 2 2/20, 2nd number: 1 25/56

42/20 - 81/56 is 183/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 56 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 20 × 14 = 280,
    42/20 = 42 × 14/20 × 14 = 588/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    81/56 = 81 × 5/56 × 5 = 405/280
  4. Subtract the two like fractions:
    588/280 - 405/280 = 588 - 405/280 = 183/280

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