Oxygen
Oxygen
Oxygen
20% of 20% is 4% (=0.04)
7 of out 20 in percent is (7/20)*100 = 35 percent.
100%. All of the oxygen that I breathe comes from the air! The answer that you were probably after, but did not ask, was about the percentage of oxygen in the air that we breathe. The questions may sound similar but they are not the same. The answer is a little over 20%.
Oxygen makes up about 20% of Earth's atmosphere.
Oxygen
Oxygen is the gas that accounts for about 20 percent of Earth's atmosphere.
Oxygen is approximately 21% of the air we breathe.
Oxygen is a non-metal gas that makes up about 20% of normal air.
Oxygen
Oxygen gas makes up just over 20% of the air around us.
Nitrogen, you can't survive on it obviously but you breath it in every day it is the most abundant gas in the atmosphere followed by oxygen I think.
Animals need AIR to breath in - AIR is made up of about 80% Nitrogen and 20% Oxygen. The animals use the Oxygen in the AIR.NOTE if an animal were to breath 100% Oxygen this would eventually kill it, Pure Oxygen is toxic.They need to breath AIR.
20 Percent.
Oxygen
hi, as we breath in we breath in about 20% oxygen, we breath out 16%.. we only use about 4% of the oxygen we breath in..