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Subtract 9/12 from 9/30

9/30 - 9/12 is -9/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 12 is 60
  2. For the 1st fraction, since 30 × 2 = 60,
    9/30 = 9 × 2/30 × 2 = 18/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    9/12 = 9 × 5/12 × 5 = 45/60
  4. Subtract the two fractions:
    18/60 - 45/60 = 18 - 45/60 = -27/60
  5. After reducing the fraction, the answer is -9/20

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