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Subtract 63/21 from 27/4

1st number: 6 3/4, 2nd number: 3 0/21

27/4 - 63/21 is 15/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    27/4 = 27 × 21/4 × 21 = 567/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    63/21 = 63 × 4/21 × 4 = 252/84
  4. Subtract the two fractions:
    567/84 - 252/84 = 567 - 252/84 = 315/84
  5. After reducing the fraction, the answer is 15/4
  6. In mixed form: 33/4

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