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Subtract 21/7 from 9/2

1st number: 4 1/2, 2nd number: 3 0/7

9/2 - 21/7 is 3/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 7 is 14

    Next, find the equivalent fraction of both fractional numbers with denominator 14
  2. For the 1st fraction, since 2 × 7 = 14,
    9/2 = 9 × 7/2 × 7 = 63/14
  3. Likewise, for the 2nd fraction, since 7 × 2 = 14,
    21/7 = 21 × 2/7 × 2 = 42/14
  4. Subtract the two like fractions:
    63/14 - 42/14 = 63 - 42/14 = 21/14
  5. After reducing the fraction, the answer is 3/2
  6. In mixed form: 11/2

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