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Subtract 81/56 from 42/54

1st number: 42/54, 2nd number: 1 25/56

42/54 - 81/56 is -337/504.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 56 is 1512

    Next, find the equivalent fraction of both fractional numbers with denominator 1512
  2. For the 1st fraction, since 54 × 28 = 1512,
    42/54 = 42 × 28/54 × 28 = 1176/1512
  3. Likewise, for the 2nd fraction, since 56 × 27 = 1512,
    81/56 = 81 × 27/56 × 27 = 2187/1512
  4. Subtract the two like fractions:
    1176/1512 - 2187/1512 = 1176 - 2187/1512 = -1011/1512
  5. After reducing the fraction, the answer is -337/504

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