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Subtract 21/12 from 28/8

1st number: 3 4/8, 2nd number: 1 9/12

28/8 - 21/12 is 7/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 12 is 24
  2. For the 1st fraction, since 8 × 3 = 24,
    28/8 = 28 × 3/8 × 3 = 84/24
  3. Likewise, for the 2nd fraction, since 12 × 2 = 24,
    21/12 = 21 × 2/12 × 2 = 42/24
  4. Subtract the two fractions:
    84/24 - 42/24 = 84 - 42/24 = 42/24
  5. After reducing the fraction, the answer is 7/4
  6. In mixed form: 13/4

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