Editing Pot odds (section)

==Converting odds ratios to and from percentages==
Odds are most commonly expressed as ratios, but they are not useful when comparing to equity percentages for poker. The ratio has two numbers: the size of the pot and the cost of the call. To convert this ratio to the equivalent percentage, the cost of the call is divided by the sum of these two numbers. For example, the pot is $30, and the cost of the call is $10. The pot odds in this situation are 30:10, or 3:1 when simplified. To get the percentage, 1 is divided by the sum of 3 and 1, giving 0.25, or 25% or 1/(3+1).

To convert any percentage or fraction to the equivalent odds, the numerator is subtracted from the denominator. The difference is compared to the numerator as a ratio. For example, to convert 25%, or 1/4, 1 is subtracted from 4 to get 3. The resulting ratio is 3:1.
{{seealso|Fractional odds}}