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Subtract 28/4 from 25/8

1st number: 3 1/8, 2nd number: 7 0/4

25/8 - 28/4 is -31/8.

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,
    25/8 = 25 × 1/8 × 1 = 25/8
  3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
    28/4 = 28 × 2/4 × 2 = 56/8
  4. Subtract the two like fractions:
    25/8 - 56/8 = 25 - 56/8 = -31/8

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