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Subtract 45/12 from 4/5

1st number: 4/5, 2nd number: 3 9/12

4/5 - 45/12 is -59/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 12 is 60
  2. For the 1st fraction, since 5 × 12 = 60,
    4/5 = 4 × 12/5 × 12 = 48/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    45/12 = 45 × 5/12 × 5 = 225/60
  4. Subtract the two fractions:
    48/60 - 225/60 = 48 - 225/60 = -177/60
  5. After reducing the fraction, the answer is -59/20

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