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Subtract 28/5 from 7/20

1st number: 7/20, 2nd number: 5 3/5

7/20 - 28/5 is -21/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 5 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 5 × 4 = 20,
    28/5 = 28 × 4/5 × 4 = 112/20
  4. Subtract the two like fractions:
    7/20 - 112/20 = 7 - 112/20 = -105/20
  5. After reducing the fraction, the answer is -21/4

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