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Subtract 1/21 from 27/12

1st number: 2 3/12, 2nd number: 1/21

27/12 - 1/21 is 185/84.

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,
    27/12 = 27 × 7/12 × 7 = 189/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    1/21 = 1 × 4/21 × 4 = 4/84
  4. Subtract the two fractions:
    189/84 - 4/84 = 189 - 4/84 = 185/84
  5. In mixed form: 217/84

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