You should do as much research possible and look up before fully comprehend the concept of fixed odds gaming.
Say the payout percentage for slots is 96.5%, that means that for that particular game, a total of ninety six.5% of all bets always be re-won, though can sometimes 3.5% in a cycle. https://hocvienboardgame.net/tin-tuc/choi-lo-de-tai-rikvip-trai-nghiem-thu-vi/