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Subtract 21/56 from 16/84

16/84 - 21/56 is -31/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 56 is 168
  2. For the 1st fraction, since 84 × 2 = 168,
    16/84 = 16 × 2/84 × 2 = 32/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    21/56 = 21 × 3/56 × 3 = 63/168
  4. Subtract the two fractions:
    32/168 - 63/168 = 32 - 63/168 = -31/168

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