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Subtract 7/56 from 1/42

1/42 - 7/56 is -17/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 56 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    1/42 = 1 × 4/42 × 4 = 4/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    7/56 = 7 × 3/56 × 3 = 21/168
  4. Subtract the two like fractions:
    4/168 - 21/168 = 4 - 21/168 = -17/168

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