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Subtract 81/4 from 6/8

1st number: 6/8, 2nd number: 20 1/4

6/8 - 81/4 is -39/2.

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,
    6/8 = 6 × 1/8 × 1 = 6/8
  3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
    81/4 = 81 × 2/4 × 2 = 162/8
  4. Subtract the two like fractions:
    6/8 - 162/8 = 6 - 162/8 = -156/8
  5. After reducing the fraction, the answer is -39/2

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