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Subtract 1/8 from 5/81

5/81 - 1/8 is -41/648.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 8 is 648

    Next, find the equivalent fraction of both fractional numbers with denominator 648
  2. For the 1st fraction, since 81 × 8 = 648,
    5/81 = 5 × 8/81 × 8 = 40/648
  3. Likewise, for the 2nd fraction, since 8 × 81 = 648,
    1/8 = 1 × 81/8 × 81 = 81/648
  4. Subtract the two like fractions:
    40/648 - 81/648 = 40 - 81/648 = -41/648

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