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Subtract 3/4 from 7/20

7/20 - 3/4 is -2/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 4 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 20 × 1 = 20,
    7/20 = 7 × 1/20 × 1 = 7/20
  3. Likewise, for the 2nd fraction, since 4 × 5 = 20,
    3/4 = 3 × 5/4 × 5 = 15/20
  4. Subtract the two like fractions:
    7/20 - 15/20 = 7 - 15/20 = -8/20
  5. After reducing the fraction, the answer is -2/5

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