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Subtract 9/7 from 7/42

1st number: 7/42, 2nd number: 1 2/7

7/42 - 9/7 is -47/42.

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,
    7/42 = 7 × 1/42 × 1 = 7/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    9/7 = 9 × 6/7 × 6 = 54/42
  4. Subtract the two like fractions:
    7/42 - 54/42 = 7 - 54/42 = -47/42

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