Answers

Add 30/60 and 20/81

30/60 + 20/81 is 121/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 60 × 27 = 1620,
   30/60 = 30 × 27/60 × 27 = 810/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   20/81 = 20 × 20/81 × 20 = 400/1620
4. Add the two like fractions:
   810/1620 + 400/1620 = 810 + 400/1620 = 1210/1620
5. 1210/1620 simplified gives 121/162
6. So, 30/60 + 20/81 = 121/162

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