Answers

Add 28/81 and 15/84

28/81 + 15/84 is 1189/2268.

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,
   28/81 = 28 × 28/81 × 28 = 784/2268
3. Likewise, for the 2nd fraction, since 84 × 27 = 2268,
   15/84 = 15 × 27/84 × 27 = 405/2268
4. Add the two like fractions:
   784/2268 + 405/2268 = 784 + 405/2268 = 1189/2268
5. So, 28/81 + 15/84 = 1189/2268

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