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Subtract 15/12 from 56/90

1st number: 56/90, 2nd number: 1 3/12

56/90 - 15/12 is -113/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 12 is 180
  2. For the 1st fraction, since 90 × 2 = 180,
    56/90 = 56 × 2/90 × 2 = 112/180
  3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
    15/12 = 15 × 15/12 × 15 = 225/180
  4. Subtract the two fractions:
    112/180 - 225/180 = 112 - 225/180 = -113/180

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