Answer
75%
Work Step by Step
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.
$0.75=75\%$
