Answers

Add 40/72 and 2/81

40/72 + 2/81 is 47/81.

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,
   40/72 = 40 × 9/72 × 9 = 360/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   2/81 = 2 × 8/81 × 8 = 16/648
4. Add the two like fractions:
   360/648 + 16/648 = 360 + 16/648 = 376/648
5. 376/648 simplified gives 47/81
6. So, 40/72 + 2/81 = 47/81

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