Relative humidity is a way of describing how much humidity is present in the air, compared to how much there could be.
Meteorologists often use the relative humidity as a measurement to describe the weather at various places.
When the temperature is warm, more water vapor can be in the air than when it is cold.
Formula to calculate relative humidity.
If the actual vapor density is 10 g/m3 at 20°C and the saturation vapor at that temperature is 18 g/m3, then determine the relative humidity.
Therefore, the relative humidity is 55.56%.