There are two ways betting odds are displayed. Most bookmakers use the traditional fractional system but they may use a decimal system. Fractional odds are displayed in a very familiar format, for example 2/1, 9/4, 4/1.
In spoken form, this is "two to one", "nine to four" and "four to one". If your selection wins at 2/1, for every €1 you stake, you will win €2, plus your stake back. On occasion, your winning selection might be 1/2, meaning it is odds-on. In this instance, for every €2 you bet, you will win €1, plus your stake back. In theory, the shorter the odds, the better chance a horse has of winning.