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Subtract 10/21 from 9/2

1st number: 4 1/2, 2nd number: 10/21

9/2 - 10/21 is 169/42.

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,
    9/2 = 9 × 21/2 × 21 = 189/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    10/21 = 10 × 2/21 × 2 = 20/42
  4. Subtract the two fractions:
    189/42 - 20/42 = 189 - 20/42 = 169/42
  5. In mixed form: 41/42

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