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Subtract 8/42 from 8/12

8/12 - 8/42 is 10/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 42 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    8/12 = 8 × 7/12 × 7 = 56/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    8/42 = 8 × 2/42 × 2 = 16/84
  4. Subtract the two like fractions:
    56/84 - 16/84 = 56 - 16/84 = 40/84
  5. After reducing the fraction, the answer is 10/21

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