Relative frequency determines how often an event takes place divided by the total outcome.
The relative frequency of 8th graders who want fruit smoothies can be calculated below
[tex]\begin{gathered} 8th\text{ graders who want fruit smoothies = 27} \\ \text{total outcome = }500 \\ \text{relative frequency=}\frac{27}{500}=0.054=0.05 \end{gathered}[/tex]