The angles can be used to work out what proportion of the whole population a pie chart sector represents. These fractions would be out of 360°, the number of degrees in a full turn. A pie chart ...

“Imagine a pie chart that shows Visuals at 42 percent, Numbers at 36 percent, Stupid Jokes at 15 percent and Random Complaints at 7 percent. Now let’s convert that to a bar chart.” ...