Answer
12.5% increases
Work Step by Step
Compute the percentage increase in the number of students in a lecture course as shown below:
$\begin{align}
& \text{Percentage increase}=\frac{\text{Amount of increase}}{\text{original amount}} \\
& =\frac{45-40}{40} \\
& =\frac{5}{40} \\
& =0.125
\end{align}$
Move decimals to two places right in the resultant figure and add % to it as follows:
12.5%
