Answers

Add 4/42 and 15/81

4/42 + 15/81 is 53/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 81 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 42 × 27 = 1134,
   4/42 = 4 × 27/42 × 27 = 108/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   15/81 = 15 × 14/81 × 14 = 210/1134
4. Add the two like fractions:
   108/1134 + 210/1134 = 108 + 210/1134 = 318/1134
5. 318/1134 simplified gives 53/189
6. So, 4/42 + 15/81 = 53/189

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