Answers

Add 10/42 and 28/81

10/42 + 28/81 is 331/567.

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,
   10/42 = 10 × 27/42 × 27 = 270/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   28/81 = 28 × 14/81 × 14 = 392/1134
4. Add the two like fractions:
   270/1134 + 392/1134 = 270 + 392/1134 = 662/1134
5. 662/1134 simplified gives 331/567
6. So, 10/42 + 28/81 = 331/567

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