Answers

Add 7/84 and 4/81

7/84 + 4/81 is 43/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 84 × 27 = 2268,
   7/84 = 7 × 27/84 × 27 = 189/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   4/81 = 4 × 28/81 × 28 = 112/2268
4. Add the two like fractions:
   189/2268 + 112/2268 = 189 + 112/2268 = 301/2268
5. 301/2268 simplified gives 43/324
6. So, 7/84 + 4/81 = 43/324

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