Answers

Add 63/81 and 54/72

63/81 + 54/72 is 55/36.

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,
   63/81 = 63 × 8/81 × 8 = 504/648
3. Likewise, for the 2nd fraction, since 72 × 9 = 648,
   54/72 = 54 × 9/72 × 9 = 486/648
4. Add the two like fractions:
   504/648 + 486/648 = 504 + 486/648 = 990/648
5. 990/648 simplified gives 55/36
6. So, 63/81 + 54/72 = 55/36
   In mixed form: 119/36

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