Answers

Add 18/81 and 75/5

1^st number: 18/81, 2^nd number: 15 0/5

18/81 + 75/5 is 137/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 5 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 81 × 5 = 405,
   18/81 = 18 × 5/81 × 5 = 90/405
3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
   75/5 = 75 × 81/5 × 81 = 6075/405
4. Add the two like fractions:
   90/405 + 6075/405 = 90 + 6075/405 = 6165/405
5. 6165/405 simplified gives 137/9
6. So, 18/81 + 75/5 = 137/9
   In mixed form: 152/9

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