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Subtract 20/84 from 10/63

10/63 - 20/84 is -5/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 84 is 252
  2. For the 1st fraction, since 63 × 4 = 252,
    10/63 = 10 × 4/63 × 4 = 40/252
  3. Likewise, for the 2nd fraction, since 84 × 3 = 252,
    20/84 = 20 × 3/84 × 3 = 60/252
  4. Subtract the two fractions:
    40/252 - 60/252 = 40 - 60/252 = -20/252
  5. After reducing the fraction, the answer is -5/63

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