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Subtract 63/7 from 81/4

1st number: 20 1/4, 2nd number: 9 0/7

81/4 - 63/7 is 45/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    81/4 = 81 × 7/4 × 7 = 567/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    63/7 = 63 × 4/7 × 4 = 252/28
  4. Subtract the two fractions:
    567/28 - 252/28 = 567 - 252/28 = 315/28
  5. After reducing the fraction, the answer is 45/4
  6. In mixed form: 111/4

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