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Nikku Yadav
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Posted 5 year ago
Nikku Yadav 
What percent of the air we breathe is oxygen?
5 Answer(s)
Sunita Shirtode
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Posted 5 year ago Sunita Shirtode

21 percent
Rahila Ahmed
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Posted 5 year ago Rahila Ahmed Gurushala Teacher Coach

21 percent Air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen
Kalpana Rajauriya
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Posted 5 year ago Kalpana Rajauriya

21% approx
Chandni Dabral
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Posted 5 year ago Chandni Dabral

Oxygen is 21 percent in earth atmosphere which we use for breathing.
Shubhangi Jain
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Posted 5 year ago Shubhangi Jain

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.