Answers

Add 18/81 and 27/42

18/81 + 27/42 is 109/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 42 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 81 × 14 = 1134,
   18/81 = 18 × 14/81 × 14 = 252/1134
3. Likewise, for the 2nd fraction, since 42 × 27 = 1134,
   27/42 = 27 × 27/42 × 27 = 729/1134
4. Add the two like fractions:
   252/1134 + 729/1134 = 252 + 729/1134 = 981/1134
5. 981/1134 simplified gives 109/126
6. So, 18/81 + 27/42 = 109/126

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