Answers

Add 36/42 and 18/81

36/42 + 18/81 is 68/63.

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,
   36/42 = 36 × 27/42 × 27 = 972/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   18/81 = 18 × 14/81 × 14 = 252/1134
4. Add the two like fractions:
   972/1134 + 252/1134 = 972 + 252/1134 = 1224/1134
5. 1224/1134 simplified gives 68/63
6. So, 36/42 + 18/81 = 68/63
   In mixed form: 15/63

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