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Add 7/20 and 6/81

7/20 + 6/81 is 229/540.

Steps for adding 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,
    7/20 = 7 × 81/20 × 81 = 567/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    6/81 = 6 × 20/81 × 20 = 120/1620
  4. Add the two like fractions:
    567/1620 + 120/1620 = 567 + 120/1620 = 687/1620
  5. 687/1620 simplified gives 229/540
  6. So, 7/20 + 6/81 = 229/540

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