Step 1: 100/odds or odds/100 this step breaks the American odds down into the decimal amount that’s won on the wager. 100/110 = 0.91 (again that numbers rounded up a little but you get the idea). Essentially this means that you’ll win 91% of the amount you risk. Remember that when you are converting odds to percentages then there is always a bookmaker percentage worked into the deal. What we mean by that as if you were to calculate odds to percentages on each of the three outcomes for the Liverpool v PSG game we are using as. Fractional odds conversion to percentage. Fractional odds are generally the most traditional form of expressing betting odds. They are a simple reflection of the return you will receive for a particular amount bet. So for example, the odds of 5/2 (expressed as 5 to 2) means that for every 2 units that you bet, you will receive 5 back.
By convention only a set of fractions are used in fractional odds betting markets. The set does not include exact mathematical equivalents to all possible decimal and American odds. We use the closet fraction that is used in betting markets.
For example, the exact mathematical equivalent of decimal odds 30 is fractional odds 29/1. However 29/1 is not used in betting markets, instead 30/1 is used, so that is what appears in this converter.
For an explanation of the odds types on this table see decimal, fractional and American odds. To find out what the numbers really represent see understand odds as probability with overround.