Answers

Add 49/81 and 28/72

49/81 + 28/72 is 161/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 72 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 81 × 8 = 648,
   49/81 = 49 × 8/81 × 8 = 392/648
3. Likewise, for the 2nd fraction, since 72 × 9 = 648,
   28/72 = 28 × 9/72 × 9 = 252/648
4. Add the two like fractions:
   392/648 + 252/648 = 392 + 252/648 = 644/648
5. 644/648 simplified gives 161/162
6. So, 49/81 + 28/72 = 161/162

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