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Subtract 20/35 from 15/56

15/56 - 20/35 is -17/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 35 is 280
  2. For the 1st fraction, since 56 × 5 = 280,
    15/56 = 15 × 5/56 × 5 = 75/280
  3. Likewise, for the 2nd fraction, since 35 × 8 = 280,
    20/35 = 20 × 8/35 × 8 = 160/280
  4. Subtract the two fractions:
    75/280 - 160/280 = 75 - 160/280 = -85/280
  5. After reducing the fraction, the answer is -17/56

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