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Subtract 5/4 from 12/15

1st number: 12/15, 2nd number: 1 1/4

12/15 - 5/4 is -9/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 4 is 60
  2. For the 1st fraction, since 15 × 4 = 60,
    12/15 = 12 × 4/15 × 4 = 48/60
  3. Likewise, for the 2nd fraction, since 4 × 15 = 60,
    5/4 = 5 × 15/4 × 15 = 75/60
  4. Subtract the two fractions:
    48/60 - 75/60 = 48 - 75/60 = -27/60
  5. After reducing the fraction, the answer is -9/20

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