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Add 28/45 and 15/81

28/45 + 15/81 is 109/135.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 81 is 405

    Next, find the equivalent fraction of both fractional numbers with denominator 405
  2. For the 1st fraction, since 45 × 9 = 405,
    28/45 = 28 × 9/45 × 9 = 252/405
  3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
    15/81 = 15 × 5/81 × 5 = 75/405
  4. Add the two like fractions:
    252/405 + 75/405 = 252 + 75/405 = 327/405
  5. 327/405 simplified gives 109/135
  6. So, 28/45 + 15/81 = 109/135

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