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Subtract 28/16 from 7/20

1st number: 7/20, 2nd number: 1 12/16

7/20 - 28/16 is -7/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 16 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 20 × 4 = 80,
    7/20 = 7 × 4/20 × 4 = 28/80
  3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
    28/16 = 28 × 5/16 × 5 = 140/80
  4. Subtract the two like fractions:
    28/80 - 140/80 = 28 - 140/80 = -112/80
  5. After reducing the fraction, the answer is -7/5

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