Answers

Add 7/49 and 9/81

7/49 + 9/81 is 16/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 81 is 3969
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3969
2. For the 1st fraction, since 49 × 81 = 3969,
   7/49 = 7 × 81/49 × 81 = 567/3969
3. Likewise, for the 2nd fraction, since 81 × 49 = 3969,
   9/81 = 9 × 49/81 × 49 = 441/3969
4. Add the two like fractions:
   567/3969 + 441/3969 = 567 + 441/3969 = 1008/3969
5. 1008/3969 simplified gives 16/63
6. So, 7/49 + 9/81 = 16/63

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