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Subtract 9/21 from 9/16

9/16 - 9/21 is 15/112.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 21 is 336

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 16 × 21 = 336,
    9/16 = 9 × 21/16 × 21 = 189/336
  3. Likewise, for the 2nd fraction, since 21 × 16 = 336,
    9/21 = 9 × 16/21 × 16 = 144/336
  4. Subtract the two like fractions:
    189/336 - 144/336 = 189 - 144/336 = 45/336
  5. After reducing the fraction, the answer is 15/112

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