A percent stacked line chart consists of multiple series stacked vertically and the values shown as a percentage of the whole. As shown in Figure 8‑14, the sales values appear as percentages instead of numbers. Like the percent stacked area chart, the percent stacked line chart makes sense only when displaying and comparing multiple series. Do not use this chart subtype if you are displaying only one series, for example, only sales for Europe. Like the stacked line chart, the percent stacked line chart is not as effective as the percent stacked area chart.