Answers

Add 28/81 and 8/15

28/81 + 8/15 is 356/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 15 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 81 × 5 = 405,
   28/81 = 28 × 5/81 × 5 = 140/405
3. Likewise, for the 2nd fraction, since 15 × 27 = 405,
   8/15 = 8 × 27/15 × 27 = 216/405
4. Add the two like fractions:
   140/405 + 216/405 = 140 + 216/405 = 356/405
5. So, 28/81 + 8/15 = 356/405

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