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Subtract 42/56 from 3/30

3/30 - 42/56 is -13/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 56 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 30 × 28 = 840,
    3/30 = 3 × 28/30 × 28 = 84/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    42/56 = 42 × 15/56 × 15 = 630/840
  4. Subtract the two like fractions:
    84/840 - 630/840 = 84 - 630/840 = -546/840
  5. After reducing the fraction, the answer is -13/20

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