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Subtract 15/7 from 63/42

1st number: 1 21/42, 2nd number: 2 1/7

63/42 - 15/7 is -9/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 7 is 42
  2. For the 1st fraction, since 42 × 1 = 42,
    63/42 = 63 × 1/42 × 1 = 63/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    15/7 = 15 × 6/7 × 6 = 90/42
  4. Subtract the two fractions:
    63/42 - 90/42 = 63 - 90/42 = -27/42
  5. After reducing the fraction, the answer is -9/14

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