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Subtract 16/27 from 21/28

21/28 - 16/27 is 17/108.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 27 is 756
  2. For the 1st fraction, since 28 × 27 = 756,
    21/28 = 21 × 27/28 × 27 = 567/756
  3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
    16/27 = 16 × 28/27 × 28 = 448/756
  4. Subtract the two fractions:
    567/756 - 448/756 = 567 - 448/756 = 119/756
  5. After reducing the fraction, the answer is 17/108

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