Pie Keynote Charts are circular plots, divided into sectors, each of which represents the size of some related piece of data. Pie charts are used to display the relative sizes of parts of a whole.
Pie charts are widely used in presentations and office documents. They allow you to show the proportion and percentage relationship between categories by dividing the circle into proportional segments. The length of each arc represents a proportional fraction of each category, while the whole circle represents the total of all data equal to 100%.
Pie charts are ideal for quickly getting an idea of the proportional distribution of data.