Question

On a clear and calm day, the air temperature at sunrise is 0 °C (32 °F) with a relative humidity of 85%. The air temperature reaches a maximum of 10 °C (50 °F) at 3 p.m. Assuming that no water vapor is added to or removed from the air, predict the value of the relative humidity at 3 p.m. Answer: _____ % (Round to the nearest whole number, do not include units.)

Answer 1

Here are the answers to the whole math section of that Meteorology test. (i took it and got them all right)
I took the test from a Meteorology class so here's the correct answers:

1.) 100%

2.) a. 25%
b. 33%
c. 100%

3.) 17%

4.) a. 24mb
b. 20

5.) 42%