Answers

Add 5/28 and 84/81

1^st number: 5/28, 2^nd number: 1 3/81

5/28 + 84/81 is 919/756.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   5/28 = 5 × 81/28 × 81 = 405/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   84/81 = 84 × 28/81 × 28 = 2352/2268
4. Add the two like fractions:
   405/2268 + 2352/2268 = 405 + 2352/2268 = 2757/2268
5. 2757/2268 simplified gives 919/756
6. So, 5/28 + 84/81 = 919/756
   In mixed form: 1163/756

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