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Subtract 9/21 from 25/2

1st number: 12 1/2, 2nd number: 9/21

25/2 - 9/21 is 169/14.

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,
    25/2 = 25 × 21/2 × 21 = 525/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    9/21 = 9 × 2/21 × 2 = 18/42
  4. Subtract the two fractions:
    525/42 - 18/42 = 525 - 18/42 = 507/42
  5. After reducing the fraction, the answer is 169/14
  6. In mixed form: 121/14

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