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Subtract 9/21 from 24/12

1st number: 2 0/12, 2nd number: 9/21

24/12 - 9/21 is 11/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    24/12 = 24 × 7/12 × 7 = 168/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  4. Subtract the two like fractions:
    168/84 - 36/84 = 168 - 36/84 = 132/84
  5. After reducing the fraction, the answer is 11/7
  6. In mixed form: 14/7

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