Answers

Add 56/72 and 3/81

56/72 + 3/81 is 22/27.

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,
   56/72 = 56 × 9/72 × 9 = 504/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   3/81 = 3 × 8/81 × 8 = 24/648
4. Add the two like fractions:
   504/648 + 24/648 = 504 + 24/648 = 528/648
5. 528/648 simplified gives 22/27
6. So, 56/72 + 3/81 = 22/27

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