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Subtract 6/12 from 1/42

1/42 - 6/12 is -10/21.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    1/42 = 1 × 2/42 × 2 = 2/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    6/12 = 6 × 7/12 × 7 = 42/84
  4. Subtract the two like fractions:
    2/84 - 42/84 = 2 - 42/84 = -40/84
  5. After reducing the fraction, the answer is -10/21

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