Answers

Add 18/5 and 84/81

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

18/5 + 84/81 is 626/135.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   18/5 = 18 × 81/5 × 81 = 1458/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   84/81 = 84 × 5/81 × 5 = 420/405
4. Add the two like fractions:
   1458/405 + 420/405 = 1458 + 420/405 = 1878/405
5. 1878/405 simplified gives 626/135
6. So, 18/5 + 84/81 = 626/135
   In mixed form: 486/135

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