Answers

Add 28/30 and 56/81

28/30 + 56/81 is 658/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 30 × 27 = 810,
   28/30 = 28 × 27/30 × 27 = 756/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   56/81 = 56 × 10/81 × 10 = 560/810
4. Add the two like fractions:
   756/810 + 560/810 = 756 + 560/810 = 1316/810
5. 1316/810 simplified gives 658/405
6. So, 28/30 + 56/81 = 658/405
   In mixed form: 1253/405

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