how do sports betting odds work

2 / (2 + 8) * 100 = 17.1%. As you can see, there is a 17.1% chance that Player A wins. The final betting type is moneyline and there are two different ways to figure it out. For negative odds, the calculation is: Negative American odds / (Negative American odds + 100) * 100 = implied probability. how do you count cards