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Add 6/20 and 45/81

6/20 + 45/81 is 77/90.

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,
    6/20 = 6 × 81/20 × 81 = 486/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    45/81 = 45 × 20/81 × 20 = 900/1620
  4. Add the two like fractions:
    486/1620 + 900/1620 = 486 + 900/1620 = 1386/1620
  5. 1386/1620 simplified gives 77/90
  6. So, 6/20 + 45/81 = 77/90

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