## Elementary Technical Mathematics

The base is the total amount of moisture, 2 lb/h. The part is the amount that can be removed, 1.5 lb/h. The rate of removal is unknown. The rate at which air enters is not relevant to the problem. $R=\frac{P}{B}=\frac{1.5}{2}=0.75$ Convert the decimal to a percent by moving the decimal two places to the right. $0.75=75\%$