Answers

Add 36/20 and 80/81

1^st number: 1 16/20, 2^nd number: 80/81

36/20 + 80/81 is 1129/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   36/20 = 36 × 81/20 × 81 = 2916/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   80/81 = 80 × 20/81 × 20 = 1600/1620
4. Add the two like fractions:
   2916/1620 + 1600/1620 = 2916 + 1600/1620 = 4516/1620
5. 4516/1620 simplified gives 1129/405
6. So, 36/20 + 80/81 = 1129/405
   In mixed form: 2319/405

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