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Subtract 3/24 from 21/12

1st number: 1 9/12, 2nd number: 3/24

21/12 - 3/24 is 13/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 24 is 24

    Next, find the equivalent fraction of both fractional numbers with denominator 24
  2. For the 1st fraction, since 12 × 2 = 24,
    21/12 = 21 × 2/12 × 2 = 42/24
  3. Likewise, for the 2nd fraction, since 24 × 1 = 24,
    3/24 = 3 × 1/24 × 1 = 3/24
  4. Subtract the two like fractions:
    42/24 - 3/24 = 42 - 3/24 = 39/24
  5. After reducing the fraction, the answer is 13/8
  6. In mixed form: 15/8

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