Percentage ( poker )

1) The edge or money odds a player has or thinks he has in making a particular call. Frequently a player who calls a bet to take a longshot draw or extra card announces, "Percentage"; he is often taking much the worst of it. For example, in lowball the big blind may draw four cards because there are four other players in the pot, and he is getting a better than 9-to-1 return on his investment.
2) The house cut, or rake, sometimes also called drop.