Answers

Add 8/42 and 20/81

8/42 + 20/81 is 248/567.

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,
   8/42 = 8 × 27/42 × 27 = 216/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   20/81 = 20 × 14/81 × 14 = 280/1134
4. Add the two like fractions:
   216/1134 + 280/1134 = 216 + 280/1134 = 496/1134
5. 496/1134 simplified gives 248/567
6. So, 8/42 + 20/81 = 248/567

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