batting average

(noun) (baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat. Synonyms: batting average, hitting average. Example: "Ted williams once had a batting average above .400."

(noun) (an extension of the baseball term) the proportion of times some effort succeeds. Synonyms: batting average. Example: "The salesman's batting average was 7 out of 12."