Selecting a machine that fits your gaming style can be made easier if you know how much risk you can take. The Return to Player (RTP) Percentage Is Vital. A crucial consideration when chobrian christopher slotsosing a slot machine is the RTP percentage in addition to volatility. The average amount of money returned to players over time is represented by this number; for example, a machine with a 95 percent RTP will eventually return $95 for every $100 wagered. This gives an overall sense of how advantageous a machine might be over time, but it does not ensure specific results.