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Subtract 12/15 from 5/20

5/20 - 12/15 is -11/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 15 is 60
  2. For the 1st fraction, since 20 × 3 = 60,
    5/20 = 5 × 3/20 × 3 = 15/60
  3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
    12/15 = 12 × 4/15 × 4 = 48/60
  4. Subtract the two fractions:
    15/60 - 48/60 = 15 - 48/60 = -33/60
  5. After reducing the fraction, the answer is -11/20

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