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Add 12/81 and 5/20

12/81 + 5/20 is 43/108.

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,
    12/81 = 12 × 20/81 × 20 = 240/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    5/20 = 5 × 81/20 × 81 = 405/1620
  4. Add the two like fractions:
    240/1620 + 405/1620 = 240 + 405/1620 = 645/1620
  5. 645/1620 simplified gives 43/108
  6. So, 12/81 + 5/20 = 43/108

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