Pie Charts

We use a pie chart to show how popular a category was in a survey based on how big its slice is.

The bigger a categories slice, the bigger angle it has.

And we can use the formula to see how many people voted for that category.

Interpreting Pie Charts

The Formula

Fractions and Pie Charts

​What to do

When were asked what fraction of people chose a certain category we have to give our answer as a fraction.

We can either use the angles or the totals, it depends what we are given.

Fractions and Pie Charts

Using angles - we take the angle the category has and divide it by 360.

Using totals - we take the category total and divide it by the total