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Subtract 3/56 from 21/8

1st number: 2 5/8, 2nd number: 3/56

21/8 - 3/56 is 18/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 56 is 56
  2. For the 1st fraction, since 8 × 7 = 56,
    21/8 = 21 × 7/8 × 7 = 147/56
  3. Likewise, for the 2nd fraction, since 56 × 1 = 56,
    3/56 = 3 × 1/56 × 1 = 3/56
  4. Subtract the two fractions:
    147/56 - 3/56 = 147 - 3/56 = 144/56
  5. After reducing the fraction, the answer is 18/7
  6. In mixed form: 24/7

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