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Subtract 81/12 from 7/28

1st number: 7/28, 2nd number: 6 9/12

7/28 - 81/12 is -13/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 28 × 3 = 84,
    7/28 = 7 × 3/28 × 3 = 21/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    81/12 = 81 × 7/12 × 7 = 567/84
  4. Subtract the two like fractions:
    21/84 - 567/84 = 21 - 567/84 = -546/84
  5. After reducing the fraction, the answer is -13/2

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