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Subtract 90/7 from 27/8

1st number: 3 3/8, 2nd number: 12 6/7

27/8 - 90/7 is -531/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 7 is 56
  2. For the 1st fraction, since 8 × 7 = 56,
    27/8 = 27 × 7/8 × 7 = 189/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    90/7 = 90 × 8/7 × 8 = 720/56
  4. Subtract the two fractions:
    189/56 - 720/56 = 189 - 720/56 = -531/56

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