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Subtract 1/20 from 10/81

10/81 - 1/20 is 119/1620.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 20 is 1620

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 81 × 20 = 1620,
    10/81 = 10 × 20/81 × 20 = 200/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    1/20 = 1 × 81/20 × 81 = 81/1620
  4. Subtract the two like fractions:
    200/1620 - 81/1620 = 200 - 81/1620 = 119/1620

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