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Subtract 20/36 from 8/30

8/30 - 20/36 is -13/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 36 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 30 × 6 = 180,
    8/30 = 8 × 6/30 × 6 = 48/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    20/36 = 20 × 5/36 × 5 = 100/180
  4. Subtract the two like fractions:
    48/180 - 100/180 = 48 - 100/180 = -52/180
  5. After reducing the fraction, the answer is -13/45

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