The first thing you need to do is check the online casino site of your choice. gameitcenter They often display this information on their website pages and some websites even have a special section showing the Refund Rate Percentage (RTP) on their review pages. You can check out its own online slot games. Most of the time, the RTP percentage is displayed somewhere and it is often found in the contribution section. The RTP percentage is usually between 92% and 97% and it is calculated on a scale of 1 to 100.