Image caption, The third sector to be drawn ... is playing video games is 20% of the pie chart. Number of pupils = 20% of 660 = 0.20 × 660 = 132. One hundred and thirty-two students’ favourite ...

You can view one pie chart at a time, or multiple pie charts that are organized in a row or in a grid ... The charts are organized in a row. If you add a third independent variable, its values are ...