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Subtract 3/21 from 5/12

5/12 - 3/21 is 23/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    5/12 = 5 × 7/12 × 7 = 35/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    3/21 = 3 × 4/21 × 4 = 12/84
  4. Subtract the two fractions:
    35/84 - 12/84 = 35 - 12/84 = 23/84

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