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Subtract 20/28 from 56/90

56/90 - 20/28 is -29/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 28 is 1260
  2. For the 1st fraction, since 90 × 14 = 1260,
    56/90 = 56 × 14/90 × 14 = 784/1260
  3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
    20/28 = 20 × 45/28 × 45 = 900/1260
  4. Subtract the two fractions:
    784/1260 - 900/1260 = 784 - 900/1260 = -116/1260
  5. After reducing the fraction, the answer is -29/315

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