Answers

Add 72/81 and 49/84

72/81 + 49/84 is 53/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 84 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 81 × 28 = 2268,
   72/81 = 72 × 28/81 × 28 = 2016/2268
3. Likewise, for the 2nd fraction, since 84 × 27 = 2268,
   49/84 = 49 × 27/84 × 27 = 1323/2268
4. Add the two like fractions:
   2016/2268 + 1323/2268 = 2016 + 1323/2268 = 3339/2268
5. 3339/2268 simplified gives 53/36
6. So, 72/81 + 49/84 = 53/36
   In mixed form: 117/36

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