Answers

Add 15/81 and 63/84

15/81 + 63/84 is 101/108.

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,
   15/81 = 15 × 28/81 × 28 = 420/2268
3. Likewise, for the 2nd fraction, since 84 × 27 = 2268,
   63/84 = 63 × 27/84 × 27 = 1701/2268
4. Add the two like fractions:
   420/2268 + 1701/2268 = 420 + 1701/2268 = 2121/2268
5. 2121/2268 simplified gives 101/108
6. So, 15/81 + 63/84 = 101/108

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