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Subtract 27/7 from 63/42

1st number: 1 21/42, 2nd number: 3 6/7

63/42 - 27/7 is -33/14.

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,
    27/7 = 27 × 6/7 × 6 = 162/42
  4. Subtract the two fractions:
    63/42 - 162/42 = 63 - 162/42 = -99/42
  5. After reducing the fraction, the answer is -33/14

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