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Subtract 20/36 from 4/20

4/20 - 20/36 is -16/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 36 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    4/20 = 4 × 9/20 × 9 = 36/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    20/36 = 20 × 5/36 × 5 = 100/180
  4. Subtract the two like fractions:
    36/180 - 100/180 = 36 - 100/180 = -64/180
  5. After reducing the fraction, the answer is -16/45

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