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Subtract 9/15 from 20/36

20/36 - 9/15 is -2/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 15 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 36 × 5 = 180,
    20/36 = 20 × 5/36 × 5 = 100/180
  3. Likewise, for the 2nd fraction, since 15 × 12 = 180,
    9/15 = 9 × 12/15 × 12 = 108/180
  4. Subtract the two like fractions:
    100/180 - 108/180 = 100 - 108/180 = -8/180
  5. After reducing the fraction, the answer is -2/45

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