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Subtract 5/18 from 3/15

3/15 - 5/18 is -7/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    3/15 = 3 × 6/15 × 6 = 18/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    5/18 = 5 × 5/18 × 5 = 25/90
  4. Subtract the two like fractions:
    18/90 - 25/90 = 18 - 25/90 = -7/90

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