a meterologists wants to create a visual aid representing the percentages of different gases in earths atmosphere? which chart or graph would best convey this data?

The percentage of gases present in Earth's atmosphere is best described as a visual aid in a Pie Chart.

Explanation:

In the Microsoft application, a pie chart is used to display the percentages of things. It represents the proportion of a data by the nature, thus, it is the best way to show the percentages. In order to visually display the percentages of various gases that is present in the atmosphere of Earth, a meteorologist might use a pie chart.