Answers

Add 28/81 and 6/30

28/81 + 6/30 is 221/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 30 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   28/81 = 28 × 10/81 × 10 = 280/810
3. Likewise, for the 2nd fraction, since 30 × 27 = 810,
   6/30 = 6 × 27/30 × 27 = 162/810
4. Add the two like fractions:
   280/810 + 162/810 = 280 + 162/810 = 442/810
5. 442/810 simplified gives 221/405
6. So, 28/81 + 6/30 = 221/405

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