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Subtract 5/7 from 4/42

4/42 - 5/7 is -13/21.

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,
    4/42 = 4 × 1/42 × 1 = 4/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    5/7 = 5 × 6/7 × 6 = 30/42
  4. Subtract the two like fractions:
    4/42 - 30/42 = 4 - 30/42 = -26/42
  5. After reducing the fraction, the answer is -13/21

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