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Subtract 56/84 from 20/35

20/35 - 56/84 is -2/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 84 is 420
  2. For the 1st fraction, since 35 × 12 = 420,
    20/35 = 20 × 12/35 × 12 = 240/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    56/84 = 56 × 5/84 × 5 = 280/420
  4. Subtract the two fractions:
    240/420 - 280/420 = 240 - 280/420 = -40/420
  5. After reducing the fraction, the answer is -2/21

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