How, knowing the absolute humidity of the air in the room, determine the relative humidity of the air?

How, knowing the absolute humidity of the air in the room, determine the relative humidity of the air? Determine the relative humidity in the room if the absolute humidity is 12.2 g / m³ and the temperature is 26 degrees.

Relative air humidity F is the ratio of the absolute humidity R to the maximum possible absolute humidity Rн at a given temperature:
F = (R / Rн) * 100%.
We find Rn from the ready-made table of the dependence of the density of saturated water vapor on temperature.
For a temperature of 26 ° С Rн = 0.0243 kg / m³.
F = ((0.0122 kg / m³) / (0.0243 kg / m³)) * 100% = 50.2%.
Answer: Relative humidity – 50.2%.