[tex]\begin{gathered} \text{Ellis throws}\Rightarrow\frac{20}{360}\times100=5.55\text{ \%} \\ \text{Betty throws}\Rightarrow\frac{300}{320}\times100=93.75\text{ \%} \\ \text{Kathy throws}\Rightarrow90\text{ \%} \\ \text{Denise}\Rightarrow0.913=91.3\text{ \%} \\ \text{From the above conculsion,} \\ \text{Betty had highest percentage.} \end{gathered}[/tex]