What is the approximate percentage of argon in the Earth's atmosphere?

The approximate percentage of argon in the Earth's atmosphere is around 0.93%. Argon is a noble gas and makes up a small fraction of the atmosphere, which is primarily composed of nitrogen (about 78%) and oxygen (about 21%). The small percentage of argon is significant because it plays a role in various processes within the atmosphere, but its concentration remains relatively stable and low compared to the primary gases. This makes argon an important component in understanding atmospheric composition and behavior, despite its minor presence.