A crucial factor to take into account is the machine's payback percentage, which is also referred to as the return to player (RTP) percentage. The percenrummy rani apktage that players receive back in winnings over time from their machine wagers is shown by this figure. Generally speaking, choosing a slot machine with a higher payback percentage is a smart move because it will raise your chances of winning over time. Calculating Volatility: Comparing Risk and Return.