The pie chart below shows the favourite ball games of a group of students. Part of the data is also represented in the bar graph below.

1. Identify the angle representing soccer and convert it to a percentage

The angle for soccer is a right angle, which is $90^\circ$.
$\text{Percentage} = \frac{90^\circ}{360^\circ} \times 100\% = 25\%$

1. Read the number of students who chose soccer from the bar graph

From the bar graph, the number of students who chose soccer is $120$.

2. Use the pie chart angle to find the total number of students

From the pie chart, soccer is represented by a right angle ($90^\circ$), which is $\frac{90}{360} = \frac{1}{4}$ of the total.
Let the total number of students be $T$.
$\frac{1}{4} T = 120$
$T = 120 \times 4 = 480$