Answers

Add 5/20 and 84/81

1^st number: 5/20, 2^nd number: 1 3/81

5/20 + 84/81 is 139/108.

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,
   5/20 = 5 × 81/20 × 81 = 405/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   84/81 = 84 × 20/81 × 20 = 1680/1620
4. Add the two like fractions:
   405/1620 + 1680/1620 = 405 + 1680/1620 = 2085/1620
5. 2085/1620 simplified gives 139/108
6. So, 5/20 + 84/81 = 139/108
   In mixed form: 131/108

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