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Subtract 15/20 from 10/28

10/28 - 15/20 is -11/28.

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,
    10/28 = 10 × 5/28 × 5 = 50/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    15/20 = 15 × 7/20 × 7 = 105/140
  4. Subtract the two like fractions:
    50/140 - 105/140 = 50 - 105/140 = -55/140
  5. After reducing the fraction, the answer is -11/28

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