Answers

Add 72/81 and 7/84

72/81 + 7/84 is 35/36.

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,
   7/84 = 7 × 27/84 × 27 = 189/2268
4. Add the two like fractions:
   2016/2268 + 189/2268 = 2016 + 189/2268 = 2205/2268
5. 2205/2268 simplified gives 35/36
6. So, 72/81 + 7/84 = 35/36

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