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Subtract 15/18 from 7/54

7/54 - 15/18 is -19/27.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 18 is 54

    Next, find the equivalent fraction of both fractional numbers with denominator 54
  2. For the 1st fraction, since 54 × 1 = 54,
    7/54 = 7 × 1/54 × 1 = 7/54
  3. Likewise, for the 2nd fraction, since 18 × 3 = 54,
    15/18 = 15 × 3/18 × 3 = 45/54
  4. Subtract the two like fractions:
    7/54 - 45/54 = 7 - 45/54 = -38/54
  5. After reducing the fraction, the answer is -19/27

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