Answers

Add 54/81 and 6/72

54/81 + 6/72 is 3/4.

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,
   54/81 = 54 × 8/81 × 8 = 432/648
3. Likewise, for the 2nd fraction, since 72 × 9 = 648,
   6/72 = 6 × 9/72 × 9 = 54/648
4. Add the two like fractions:
   432/648 + 54/648 = 432 + 54/648 = 486/648
5. 486/648 simplified gives 3/4
6. So, 54/81 + 6/72 = 3/4

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