To find the percentage of aisles that are empty, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Number of empty aisles}}{\text{Total number of aisles}} \right) \times 100 \]
In this case, the number of empty aisles is 8, and the total number of aisles is 50.
\[ \text{Percentage} = \left( \frac{8}{50} \right) \times 100 \]
Calculating this:
\[ \text{Percentage} = 0.16 \times 100 = 16 \]
So, 16% of the aisles are empty.
The final answer is:
16%