Explanation: marks obtained by the student will be from 100 percent whether the are in grade or in percent.

so we will change all these into percent as follows.

Nate's percentage is

\(\displaystyle{\frac{{{7}}}{{{8}}}}\times{100}\%\)

\(\displaystyle={7}\times{12.5}\%\)

\(\displaystyle={87.5}\%\)

Step 2

Cal's percentage is

\(\displaystyle{\frac{{{15}}}{{{16}}}}\times{100}\%\)

\(\displaystyle={15}\times{6.25}\%\)

\(\displaystyle={93.75}\%\)

Emery's percentage is

\(\displaystyle{\frac{{{5}}}{{{6}}}}\times{100}\%\)

\(\displaystyle={5}\times{16.66}\%\)

\(\displaystyle={83.3}\%\)

this implies that Cal scored highest grade in the test that is \(\displaystyle{93.75}\%\).

so we will change all these into percent as follows.

Nate's percentage is

\(\displaystyle{\frac{{{7}}}{{{8}}}}\times{100}\%\)

\(\displaystyle={7}\times{12.5}\%\)

\(\displaystyle={87.5}\%\)

Step 2

Cal's percentage is

\(\displaystyle{\frac{{{15}}}{{{16}}}}\times{100}\%\)

\(\displaystyle={15}\times{6.25}\%\)

\(\displaystyle={93.75}\%\)

Emery's percentage is

\(\displaystyle{\frac{{{5}}}{{{6}}}}\times{100}\%\)

\(\displaystyle={5}\times{16.66}\%\)

\(\displaystyle={83.3}\%\)

this implies that Cal scored highest grade in the test that is \(\displaystyle{93.75}\%\).