In such graphs, the entire pie represents 100% of the whole, while the pie slices represent portions of the whole. Pie charts, or circular graphs as they are also known, are a popular way to show how much individual amounts or percentages contribute to the total. In this Excel pie chart tutorial, you will learn how to make a pie chart in Excel, add or remove the legend, label your pie graph, show percentages, explode or rotate a pie chart, and much more.