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Subtract 18/27 from 9/15

9/15 - 18/27 is -1/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 27 is 135
  2. For the 1st fraction, since 15 × 9 = 135,
    9/15 = 9 × 9/15 × 9 = 81/135
  3. Likewise, for the 2nd fraction, since 27 × 5 = 135,
    18/27 = 18 × 5/27 × 5 = 90/135
  4. Subtract the two fractions:
    81/135 - 90/135 = 81 - 90/135 = -9/135
  5. After reducing the fraction, the answer is -1/15

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