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Subtract 90/7 from 63/4

1st number: 15 3/4, 2nd number: 12 6/7

63/4 - 90/7 is 81/28.

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,
    63/4 = 63 × 7/4 × 7 = 441/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    90/7 = 90 × 4/7 × 4 = 360/28
  4. Subtract the two fractions:
    441/28 - 360/28 = 441 - 360/28 = 81/28
  5. In mixed form: 225/28

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