the link is to an ROI calculator -
it's for investments and defaults to a four year time period but you can just ignore that and ignore the annualized ROI unless that is what you are calculating and ignore the investment length - it can be for any length of time - a day, a week, etc.
the amount invested should be the total amount you wagered
the amount returned should be the total amount you ended up with
https://www.calculator.net/roi-calcu...pe=1&x=75&y=18