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Subtract 3/27 from 1/42

1/42 - 3/27 is -11/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 27 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    1/42 = 1 × 9/42 × 9 = 9/378
  3. Likewise, for the 2nd fraction, since 27 × 14 = 378,
    3/27 = 3 × 14/27 × 14 = 42/378
  4. Subtract the two like fractions:
    9/378 - 42/378 = 9 - 42/378 = -33/378
  5. After reducing the fraction, the answer is -11/126

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