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Subtract 27/4 from 12/8

1st number: 1 4/8, 2nd number: 6 3/4

12/8 - 27/4 is -21/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 4 is 8

    Next, find the equivalent fraction of both fractional numbers with denominator 8
  2. For the 1st fraction, since 8 × 1 = 8,
    12/8 = 12 × 1/8 × 1 = 12/8
  3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
    27/4 = 27 × 2/4 × 2 = 54/8
  4. Subtract the two like fractions:
    12/8 - 54/8 = 12 - 54/8 = -42/8
  5. After reducing the fraction, the answer is -21/4

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