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Subtract 3/7 from 18/84

18/84 - 3/7 is -3/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 7 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 84 × 1 = 84,
    18/84 = 18 × 1/84 × 1 = 18/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    3/7 = 3 × 12/7 × 12 = 36/84
  4. Subtract the two like fractions:
    18/84 - 36/84 = 18 - 36/84 = -18/84
  5. After reducing the fraction, the answer is -3/14

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