Pie and doughnut charts are used to show parts of a whole. This type of chart will represent numbers in percentages and the total sum of all the divided segments equals 100 percent. To break this down, pie/doughnut charts work by feeding them a set of data and the component works out what the percentage of the total of all values passed to it are. For example, your data could be '500, 250, 250' as values, and you'd get a half and two quarters showing within the chart.
The example below consists of data relating to revenue per department:
Make sure your segments add up to 100%.
Compare only a few categories to get your point across, and if the pie slices have roughly the same size you could consider using a bar chart instead.
Other articles in the ‘Module Types: Charting’ series
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