The bar graph below shows the preferred breakfast for 40 students belonging to class $IX$. The number of students who prefer pancakes as a percentage of the total number of students is

Question

$\begin{array}{1 1} (a)\; 25 \% \\ (b)\; 12.5 \% \\ (c)\; 75 \% \\ (d)\; 37.5 \end{array}$