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Subtract 7/20 from 2/5

2/5 - 7/20 is 1/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 20 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 5 × 4 = 20,
    2/5 = 2 × 4/5 × 4 = 8/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    7/20 = 7 × 1/20 × 1 = 7/20
  4. Subtract the two like fractions:
    8/20 - 7/20 = 8 - 7/20 = 1/20

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