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Subtract 15/81 from 1/18

1/18 - 15/81 is -7/54.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 81 is 162

    Next, find the equivalent fraction of both fractional numbers with denominator 162
  2. For the 1st fraction, since 18 × 9 = 162,
    1/18 = 1 × 9/18 × 9 = 9/162
  3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
    15/81 = 15 × 2/81 × 2 = 30/162
  4. Subtract the two like fractions:
    9/162 - 30/162 = 9 - 30/162 = -21/162
  5. After reducing the fraction, the answer is -7/54

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