(n) basic rate
base rate
(n) ratio of successful (applicants) to total applicants
(n) refractive index
(n) absentee rate
(n) coverage
coverage ratio
(n) attenuation (factor, rate)
(n) (comp) blocking ratio
(n) (comp) error rate
(n,vs) making efficient
optimization
(n) efficiency
(adj-na) efficient
(P)
(n) porosity
(n) ratio of successful applicants
(examination) pass rate
(n) recall
recall factor
recall ratio
(n) (comp) utilization rate
activity ratio
(n) approval rating
(n) death rate
mortality
(P)
(n) ratings (of a television program) (programme)
(P)
(n) (the degree of) self-sufficiency (e.g. in oil)
(n) literacy rate
(n) unemployment rate
(n) rate of failure
(n) one's fielding average
(n) earning rate
(n) percentage of school attendance
(n) percentage of employment
(n) employment rate
(n) birthrate
(n) birth rate
(n) birth rate