Answers

Add 21/81 and 27/4

1^st number: 21/81, 2^nd number: 6 3/4

21/81 + 27/4 is 757/108.

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,
   21/81 = 21 × 4/81 × 4 = 84/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   27/4 = 27 × 81/4 × 81 = 2187/324
4. Add the two like fractions:
   84/324 + 2187/324 = 84 + 2187/324 = 2271/324
5. 2271/324 simplified gives 757/108
6. So, 21/81 + 27/4 = 757/108
   In mixed form: 71/108

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