Insert new worksheet. Make sure the Show Me options are displayed on the right. Select Channel Name (dimension) and Sales Amount (measure) (holding down the CTRL key). Review the potential chart options. Choose the pie chart. Change the view (ribbon bar) from Standard to Entire View so the pie chart appears larger and in the center of the sheet. Click on the (SUM) Sales Amount pill next to the pie slice icon under the Marks area. Select Quick Table Calculation > Percent of Total so the pie chart shows the percent of total sales for each slice. Drag Channel Name to the label mark to label each slice with the channel name. Change the title to "Channel Sales Percentages." Rename the worksheet to "Channel Sales Pie."