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Pot odds
In poker, pot odds are the ratio of the current size of the pot to the cost of a contemplated call.〔Sklansky, 1987, Glossary〕 Pot odds are often compared to the probability of winning a hand with a future card in order to estimate the call's expected value.
==Converting odds ratios to and from percentages==
Odds are most commonly expressed as ratios, but converting them to percentages will often make them easier to work with. The ratio has two numbers: the size of the pot and the cost of the call. To convert this ratio to the equivalent percentage, we add these two numbers together and then divide the cost of the call by this sum. 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, we add $30 and $10 to get a sum of $40 and then divide $10 by $40, giving us 1/4, or 25%.
To convert any percentage or fraction to the equivalent odds, we subtract the numerator from the denominator and then divide this difference by the numerator. For example, to convert 25%, or 1/4, we subtract 1 from 4 to get 3 (or 25 from 100 to get 75) and then divide 3 by 1 (or 75 by 25), giving us 3, or 3:1.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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