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Add 18/81 and 6/20

18/81 + 6/20 is 47/90.

Steps for adding 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,
    18/81 = 18 × 20/81 × 20 = 360/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    6/20 = 6 × 81/20 × 81 = 486/1620
  4. Add the two like fractions:
    360/1620 + 486/1620 = 360 + 486/1620 = 846/1620
  5. 846/1620 simplified gives 47/90
  6. So, 18/81 + 6/20 = 47/90

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