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Subtract 16/45 from 21/28

21/28 - 16/45 is 71/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 45 is 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    21/28 = 21 × 45/28 × 45 = 945/1260
  3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
    16/45 = 16 × 28/45 × 28 = 448/1260
  4. Subtract the two fractions:
    945/1260 - 448/1260 = 945 - 448/1260 = 497/1260
  5. After reducing the fraction, the answer is 71/180

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