Answers

Add 28/12 and 90/81

1^st number: 2 4/12, 2^nd number: 1 9/81

28/12 + 90/81 is 31/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 12 × 27 = 324,
   28/12 = 28 × 27/12 × 27 = 756/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   90/81 = 90 × 4/81 × 4 = 360/324
4. Add the two like fractions:
   756/324 + 360/324 = 756 + 360/324 = 1116/324
5. 1116/324 simplified gives 31/9
6. So, 28/12 + 90/81 = 31/9
   In mixed form: 34/9

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