# In one cubic meter of air 0.21 m3 of oxygen. Find the percentage ratio of oxygen in a room

March 30, 2021 | education

| **In one cubic meter of air 0.21 m3 of oxygen. Find the percentage ratio of oxygen in a room with measurements of 7m 4m 3m to oxygen in 1m3**

Find the volume of the room (multiply its dimensions):

7 * 3 * 4 = 84 m ^ 2.

Then the amount of oxygen in the room is equal to:

84 * 0.21 = 17.64 m ^ 2.

Find the volume ratio and multiply it by 100:

0.21 / 17.64 * 100 = 1.19%.

Answer: 1 m ^ 3 contains 1.19% of the oxygen contained in the room).

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