takeout
n.— «The OJC receives 9.5 cents per dollar wagered through the mutuels and turns back approximately 50 per cent of its takeout to the horsemen in purses.» —“Backstretch bookmaking at racetrack, OPP charge” by James Golla Globe and Mail (Toronto, Can.) Jan. 17, 1978. (source: Double-Tongued Dictionary)