## Answer

###### Wiki User

###### 06/05/2011

For the same sorts of uses as they are today : to illustrate how a total value is divided into smaller groups.

A pie chart (a circle divided into slices of various angular widths) is used to show comparative percentages within a whole. The size of a slice is proportional to the share that is assigned to a given subgroup, role, or division. For example, a pie chart for business revenue can be divided into wedges showing the sources of that revenue (sales, stock dividends, franchising), and the sales wedge could be 2/3 or 3/4 of the pie, with other earnings areas having smaller slices.

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