Pie Chart

In this app you will see pie chart in multiple shade

om each. The sum of all the revenue figures is the same as your total revenue, and you can look at each division and see how much (i.e., how many percent) it contributes.

Another common example is election data: you have seven candidates running for an office, they each get some number of votes. The total number of votes is all those added up (plus perhaps invalid votes that would make up their own category). The percentage of the vote each candidate gets is what you're after, and you can see that in

Why Are Pie Charts Controversial?

It's not clear to me exactly why they are singled out like that. There are lots of bad examples of people doing bad things with pie charts, and perhaps they're more obvious or more common with pies. Pie charts also allow less precise reading than some other charts, so it's easy to dismiss them as worthless – but precision isn't always the main goal, and they have other advantages.

To illustrate the problem with pie charts and precision, this image by