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Subtract 45/12 from 28/15

1st number: 1 13/15, 2nd number: 3 9/12

28/15 - 45/12 is -113/60.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 12 is 60
  2. For the 1st fraction, since 15 × 4 = 60,
    28/15 = 28 × 4/15 × 4 = 112/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    45/12 = 45 × 5/12 × 5 = 225/60
  4. Subtract the two fractions:
    112/60 - 225/60 = 112 - 225/60 = -113/60

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