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Subtract 1/81 from 6/20

6/20 - 1/81 is 233/810.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 20 × 81 = 1620,
    6/20 = 6 × 81/20 × 81 = 486/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    1/81 = 1 × 20/81 × 20 = 20/1620
  4. Subtract the two like fractions:
    486/1620 - 20/1620 = 486 - 20/1620 = 466/1620
  5. After reducing the fraction, the answer is 233/810

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