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Subtract 70/63 from 15/42

1st number: 15/42, 2nd number: 1 7/63

15/42 - 70/63 is -95/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 63 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    15/42 = 15 × 3/42 × 3 = 45/126
  3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
    70/63 = 70 × 2/63 × 2 = 140/126
  4. Subtract the two like fractions:
    45/126 - 140/126 = 45 - 140/126 = -95/126

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