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Subtract 7/8 from 28/42

28/42 - 7/8 is -5/24.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    28/42 = 28 × 4/42 × 4 = 112/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    7/8 = 7 × 21/8 × 21 = 147/168
  4. Subtract the two like fractions:
    112/168 - 147/168 = 112 - 147/168 = -35/168
  5. After reducing the fraction, the answer is -5/24

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