Answers

Add 28/5 and 63/81

1^st number: 5 3/5, 2^nd number: 63/81

28/5 + 63/81 is 287/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   28/5 = 28 × 81/5 × 81 = 2268/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   63/81 = 63 × 5/81 × 5 = 315/405
4. Add the two like fractions:
   2268/405 + 315/405 = 2268 + 315/405 = 2583/405
5. 2583/405 simplified gives 287/45
6. So, 28/5 + 63/81 = 287/45
   In mixed form: 617/45

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