Step-by-step tutorial

Here's the market capitalization for the so-called FAANG stocks (Facebook, Apple, Amazon, Netflix, Google) as of September 2, 2020:

Market cap of FAANG stocks on Sep 2, 2020
Market cap of FAANG stocks on Sep 2, 2020

To create a pie chart, select the two columns and choose the Insert tab. Then choose either Recommended Charts or else the Pie Chart icon. We'll use the Pie Chart icon here:

Choosing a pie chart
Choosing a pie chart

After you choose the chart, the result looks like this:

Pie chart for market cap of FAANG stocks on Sep 2, 2020
Pie chart for market cap of FAANG stocks on Sep 2, 2020