Given:
Number of times Caroline served the ball over the net out of 20 times = 16
Required: Percentage of Caroline did not make her serve over the net
Explanation:
Number of times Caroline not served the ball over the net out of 20 times
[tex]\begin{gathered} =20-16 \\ =4 \end{gathered}[/tex]Percentage of Caroline did not make her serve over the net
[tex]\begin{gathered} =\frac{4}{20}\cdot100\% \\ =20\% \end{gathered}[/tex]Final Answer: Percentage of Caroline did not make her serve over the net is 20%.