Answer Exercises 29–32 without using a calculator.
Multiple Choice $A$ sector on a pie chart with a central angle of $45^{\circ}$ corresponds to what percentage of the data?
$\begin{array}{ll}{\text { (A) } 8 \%} & {\text { (B) } 12.5 \%} \\ {\text { (C) } 15 \%} & {\text { (D) } 25 \%} \\ {\text { (E) } 45 \%}\end{array}$