Answers

Add 15/81 and 28/54

15/81 + 28/54 is 19/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 54 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 81 × 2 = 162,
   15/81 = 15 × 2/81 × 2 = 30/162
3. Likewise, for the 2nd fraction, since 54 × 3 = 162,
   28/54 = 28 × 3/54 × 3 = 84/162
4. Add the two like fractions:
   30/162 + 84/162 = 30 + 84/162 = 114/162
5. 114/162 simplified gives 19/27
6. So, 15/81 + 28/54 = 19/27

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