Answers

Add 28/72 and 2/81

28/72 + 2/81 is 67/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 72 × 9 = 648,
   28/72 = 28 × 9/72 × 9 = 252/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   2/81 = 2 × 8/81 × 8 = 16/648
4. Add the two like fractions:
   252/648 + 16/648 = 252 + 16/648 = 268/648
5. 268/648 simplified gives 67/162
6. So, 28/72 + 2/81 = 67/162

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