Answers

Add 5/81 and 8/21

5/81 + 8/21 is 251/567.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 21 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   5/81 = 5 × 7/81 × 7 = 35/567
3. Likewise, for the 2nd fraction, since 21 × 27 = 567,
   8/21 = 8 × 27/21 × 27 = 216/567
4. Add the two like fractions:
   35/567 + 216/567 = 35 + 216/567 = 251/567
5. So, 5/81 + 8/21 = 251/567

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