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Subtract 21/8 from 7/12

1st number: 7/12, 2nd number: 2 5/8

7/12 - 21/8 is -49/24.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 8 is 24
  2. For the 1st fraction, since 12 × 2 = 24,
    7/12 = 7 × 2/12 × 2 = 14/24
  3. Likewise, for the 2nd fraction, since 8 × 3 = 24,
    21/8 = 21 × 3/8 × 3 = 63/24
  4. Subtract the two fractions:
    14/24 - 63/24 = 14 - 63/24 = -49/24

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