Recognizing the percentages of payouts from slot machines. It takes a combination of strategy, knowledge, and a little bit of luck to increase your chances of winning vegas slots 777at slot machines. Selecting machines with greater payout percentages is a basic strategy. These percentages show how much money a machine gives back to players over time and are frequently referred to as Return to Player (RTP). For example, a slot machine with a 95 percent RTP should theoretically pay out $95 for every $100 wagered.