The 50% to be a raised rule in poker states that if a player adds an additional amount of chips to the value of at least 50% of the previous bet or raised amounts, then that player should be forced to complete the raise to the full 100 percent raise. This means that if a player adds chips that are 50% or more of the previous bet, they are obligated to complete the raise to the full amount. If the additional chips are less than 50% of the previous bet, it is considered a call and the additional chips are returned to the player.