Percentage is the number of parts in 100. In the composition of air, nitrogen occupies 78%, oxygen 21%, and other gases 1%.
NCERT Textbook Curiosity Science Class 6
Chapter 11 Nature’s Treasures
How is percentage defined in relation to air composition?
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Percentage in air composition refers to the proportion of each gas present in the air, expressed as a fraction of 100. For example, nitrogen makes up 78%, oxygen 21%, and other gases about 1%.
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