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Subtract 3/7 from 5/42

5/42 - 3/7 is -13/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 7 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 42 × 1 = 42,
    5/42 = 5 × 1/42 × 1 = 5/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    3/7 = 3 × 6/7 × 6 = 18/42
  4. Subtract the two like fractions:
    5/42 - 18/42 = 5 - 18/42 = -13/42

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