# Answer Questions From a Pie Chart

Key stage:  KS 2

Curriculum topic:   Statistics

Curriculum subtopic:   Use Charts and Graphs

Difficulty level:

#### Worksheet Overview

Pie charts are based on fractions of 360°

The fractions can be worked out from the angles at the centre of the chart.

This pie chart shows the results of a survey on favourite crisp flavours.

The salt and vinegar sector shows 36° which is 36/360 of the whole circle.

We can simplify this by dividing both the top and bottom by 36 to get the fraction 1/10

Now we need a hard fact, such as the actual number who chose salt and vinegar or the total number in the survey.

Example 1

If 15 people chose salt and vinegar, how many people took part in the survey?

15 people are shown in 1/10 of the circle, so there must be 10 x 15 = 150 people in total.

Example 2

If 40 people took the survey, how many people chose salt and vinegar?

We need to work out 1/10 of 40 = 4, so 4 people chose salt and vinegar.

Shall we try some questions now - if you're not too hungry!

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