Answers

Add 8/81 and 5/20

8/81 + 5/20 is 113/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 20 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 81 × 20 = 1620,
   8/81 = 8 × 20/81 × 20 = 160/1620
3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
   5/20 = 5 × 81/20 × 81 = 405/1620
4. Add the two like fractions:
   160/1620 + 405/1620 = 160 + 405/1620 = 565/1620
5. 565/1620 simplified gives 113/324
6. So, 8/81 + 5/20 = 113/324

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