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Subtract 3/7 from 7/81

7/81 - 3/7 is -194/567.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 7 is 567

    Next, find the equivalent fraction of both fractional numbers with denominator 567
  2. For the 1st fraction, since 81 × 7 = 567,
    7/81 = 7 × 7/81 × 7 = 49/567
  3. Likewise, for the 2nd fraction, since 7 × 81 = 567,
    3/7 = 3 × 81/7 × 81 = 243/567
  4. Subtract the two like fractions:
    49/567 - 243/567 = 49 - 243/567 = -194/567

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