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Subtract 15/18 from 1/20

1/20 - 15/18 is -47/60.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 18 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    1/20 = 1 × 9/20 × 9 = 9/180
  3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
    15/18 = 15 × 10/18 × 10 = 150/180
  4. Subtract the two like fractions:
    9/180 - 150/180 = 9 - 150/180 = -141/180
  5. After reducing the fraction, the answer is -47/60

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