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Subtract 81/12 from 9/6

1st number: 1 3/6, 2nd number: 6 9/12

9/6 - 81/12 is -21/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 12 is 12

    Next, find the equivalent fraction of both fractional numbers with denominator 12
  2. For the 1st fraction, since 6 × 2 = 12,
    9/6 = 9 × 2/6 × 2 = 18/12
  3. Likewise, for the 2nd fraction, since 12 × 1 = 12,
    81/12 = 81 × 1/12 × 1 = 81/12
  4. Subtract the two like fractions:
    18/12 - 81/12 = 18 - 81/12 = -63/12
  5. After reducing the fraction, the answer is -21/4

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