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Subtract 21/20 from 5/28

1st number: 5/28, 2nd number: 1 1/20

5/28 - 21/20 is -61/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    5/28 = 5 × 5/28 × 5 = 25/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    21/20 = 21 × 7/20 × 7 = 147/140
  4. Subtract the two like fractions:
    25/140 - 147/140 = 25 - 147/140 = -122/140
  5. After reducing the fraction, the answer is -61/70

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