Who to label the pie chart on the basis of percentage of gases present in the air?

In a pie chart representing the composition of gases in the air, you would typically label it with the following percentages: Nitrogen (approximately 78%), Oxygen (about 21%), Argon (around 0.93%), and Carbon Dioxide (about 0.04%). Other trace gases can also be included, but their percentages are minimal. Each segment should be clearly labeled to indicate the gas and its corresponding percentage for clarity.