Pie charts

A pie chart is a circular chart. It shows the proportion of each group at a glance. Remember that there are 360° in a circle so each group in the pie chart will be a proportion of 360°.

A survey of the number of people in 180 vehicles is taken.

The results are in the table below.

Number of people in a vehicleFrequency
1 120
240
3 13
45
5 or more2
Total180

To draw a pie chart for this data, find the proportion of 360.

Number of people in vehicleFrequencyCalculationAngle
1 person120 \frac{120}{180} \times 360°240°
2 people40 \frac{40}{180} \times 360°80°
3 people13 \frac{13}{180} \times 360°26°
4 people5 \frac{5}{180} \times 360°10°
5 or more2 \frac{2}{180} \times 360°
Total180
Pie chart showing number of people travelling in a vehicle