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Subtract 81/84 from 21/2

1st number: 10 1/2, 2nd number: 81/84

21/2 - 81/84 is 267/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 84 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 2 × 42 = 84,
    21/2 = 21 × 42/2 × 42 = 882/84
  3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
    81/84 = 81 × 1/84 × 1 = 81/84
  4. Subtract the two like fractions:
    882/84 - 81/84 = 882 - 81/84 = 801/84
  5. After reducing the fraction, the answer is 267/28
  6. In mixed form: 915/28

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