Answers

Add 40/42 and 28/81

40/42 + 28/81 is 736/567.

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,
   40/42 = 40 × 27/42 × 27 = 1080/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   28/81 = 28 × 14/81 × 14 = 392/1134
4. Add the two like fractions:
   1080/1134 + 392/1134 = 1080 + 392/1134 = 1472/1134
5. 1472/1134 simplified gives 736/567
6. So, 40/42 + 28/81 = 736/567
   In mixed form: 1169/567

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