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Subtract 15/35 from 8/28

8/28 - 15/35 is -1/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 35 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    8/28 = 8 × 5/28 × 5 = 40/140
  3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
    15/35 = 15 × 4/35 × 4 = 60/140
  4. Subtract the two like fractions:
    40/140 - 60/140 = 40 - 60/140 = -20/140
  5. After reducing the fraction, the answer is -1/7

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