ELI5. How do air humidity percentages work?

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If it’s 80% humidity outside you may assume it’s quite damp, but what does the 80% translate to in numbers? I cant imagine 80% of the air to be moisture since it’s mostly nitrogen. And how is it calculated/measured?

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Anonymous 0 Comments

Relative humidity is a comparison between the current moisture content of the air as a percentage of the maximum moisture content possible at that temperature/pressure.

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