Answers

Add 6/72 and 20/81

6/72 + 20/81 is 107/324.

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,
   6/72 = 6 × 9/72 × 9 = 54/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   20/81 = 20 × 8/81 × 8 = 160/648
4. Add the two like fractions:
   54/648 + 160/648 = 54 + 160/648 = 214/648
5. 214/648 simplified gives 107/324
6. So, 6/72 + 20/81 = 107/324

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