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Subtract 2/21 from 7/2

1st number: 3 1/2, 2nd number: 2/21

7/2 - 2/21 is 143/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 21 is 42
  2. For the 1st fraction, since 2 × 21 = 42,
    7/2 = 7 × 21/2 × 21 = 147/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    2/21 = 2 × 2/21 × 2 = 4/42
  4. Subtract the two fractions:
    147/42 - 4/42 = 147 - 4/42 = 143/42
  5. In mixed form: 317/42

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