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Subtract 81/12 from 28/10

1st number: 2 8/10, 2nd number: 6 9/12

28/10 - 81/12 is -79/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 10 × 6 = 60,
    28/10 = 28 × 6/10 × 6 = 168/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    81/12 = 81 × 5/12 × 5 = 405/60
  4. Subtract the two like fractions:
    168/60 - 405/60 = 168 - 405/60 = -237/60
  5. After reducing the fraction, the answer is -79/20

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