Pie Chart

Pie charts are graphs denoted by slices where each slice gives information about the share of each category. They are used for displaying categorical data such as care sales by model, proportion of religions in the country, and favorite ice-cream flavors. 

Clearly, pie charts do a good job of highlighting the top three or four categories and how they compare with each other and with the rest.

However, they fall short of giving a good experience of comprehension when there are too many categories with no dominating ones.

When building pie charts, you may want to keep these in mind:

• It's a pie, so it needs to have all parts total up to a 100%, not more, not less
• There is no ordering of categories here. The size of a part is an indicator of how dominant it is, and you can't add more parameters to order the parts.

In the above example, you can say that tablets are primarily used for games (57%) compared to smartphones where the top two uses are games (35%) and social networking (29%). You can also figure out that people tend to pay utilities bills on smartphones (20%) rather than from tablet (3%).