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Subtract 9/12 from 9/15

9/15 - 9/12 is -3/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 15 × 4 = 60,
    9/15 = 9 × 4/15 × 4 = 36/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    9/12 = 9 × 5/12 × 5 = 45/60
  4. Subtract the two like fractions:
    36/60 - 45/60 = 36 - 45/60 = -9/60
  5. After reducing the fraction, the answer is -3/20

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