Wiktionary
percentage rate
n. A coefficient that is a quotient of two numbers, in which the denominator has the same units as that of the numerator multiplied by a unit of time and that is expressed in percentage points.
Usage examples of "percentage rate".
He had a good percentage rate on closing cases, no shadows on his record, and worked Homicide the last three years.
I want to interview everyone on this ship and get a percentage rate.