Compute the relative humidity (RH) to nearest percent for each of the following atmospheric conditions: (Round to one decimal place, do not include units.)

b. vapor pressure = 4 mb, saturation vapor pressure = 16 mb, RH = _________%

To compute the relative humidity (RH), we need to use the formula:

RH = (vapor pressure / saturation vapor pressure) * 100

In this case, we are given:
- vapor pressure = 4 mb
- saturation vapor pressure = 16 mb

Now, let's substitute these values into the formula:

RH = (4 mb / 16 mb) * 100

Simplifying this expression:

RH = 0.25 * 100

RH = 25

Rounded to the nearest percent, the relative humidity is 25%.