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Subtract 20/36 from 7/15

7/15 - 20/36 is -4/45.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 15 × 12 = 180,
    7/15 = 7 × 12/15 × 12 = 84/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    20/36 = 20 × 5/36 × 5 = 100/180
  4. Subtract the two like fractions:
    84/180 - 100/180 = 84 - 100/180 = -16/180
  5. After reducing the fraction, the answer is -4/45

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