Answers

Add 7/81 and 81/4

1^st number: 7/81, 2^nd number: 20 1/4

7/81 + 81/4 is 6589/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 4 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   7/81 = 7 × 4/81 × 4 = 28/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   81/4 = 81 × 81/4 × 81 = 6561/324
4. Add the two like fractions:
   28/324 + 6561/324 = 28 + 6561/324 = 6589/324
5. So, 7/81 + 81/4 = 6589/324
   In mixed form: 20109/324

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