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Add 7/15 and 3/81

7/15 + 3/81 is 68/135.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 81 is 405

    Next, find the equivalent fraction of both fractional numbers with denominator 405
  2. For the 1st fraction, since 15 × 27 = 405,
    7/15 = 7 × 27/15 × 27 = 189/405
  3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
    3/81 = 3 × 5/81 × 5 = 15/405
  4. Add the two like fractions:
    189/405 + 15/405 = 189 + 15/405 = 204/405
  5. 204/405 simplified gives 68/135
  6. So, 7/15 + 3/81 = 68/135

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