[tex]\begin{gathered} \text{To get the percentage of divide the number of correct items in test} \\ \text{by the number of total test items} \\ \text{correct test items}=84 \\ \text{total test items}=100 \\ 84\div100=0.84 \\ \text{after, multiply it by }100\%\text{ to get the percentage} \\ 0.84\times100\%=84\% \end{gathered}[/tex]