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Subtract 1/4 from 3/42

3/42 - 1/4 is -5/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 4 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    3/42 = 3 × 2/42 × 2 = 6/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    1/4 = 1 × 21/4 × 21 = 21/84
  4. Subtract the two like fractions:
    6/84 - 21/84 = 6 - 21/84 = -15/84
  5. After reducing the fraction, the answer is -5/28

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