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7star,
Yes it should be 8/26 and not 6/26, chardrian just made a typo I think. BTW i think you mean you have problems turning odds into percentages and not fractions into percentages.
Pelion,
When you are calculating pot odds as a percentage\fraction then you do add the amount you have to call to the pot. So if the pot is $18 and you have to call $8 then you need to win 8/(18+8)=30.77% of the time to break even. With odds you dont, your pot odds are 18:8.
Your coin example would give your pot odds as a percentage as 1/2 which is 50%. So you need to win 50% of the times to break even. Your pot odds though are 1:1.
Doing it your way would be 50% of the time you lose your $1.
50% of the time you win your $1 + my $1 for a profit of $2.
If you keep making this bet you will make an average profit of
0.50 x ($1+$1) - 0.50 x $1 = $0.50
We are talking about pot odds as a percentage, to calculate your percentage you have to divide by pot + amount to call. This doesn't mean that you win pot + amount to call when you win so I dont know what you are trying to say.
Its the same thing, just a different way of representing it.
Odds
For odds of winning the hand it is
(bad outcomes) : (good outcomes)
For what the pot is offering you it is
(amount in the pot) : (amount to call)
Percentages\Fractions
For your chance of winning it is
(bad outcomes) / (good outcomes + bad outcomes)
For what the pot is offering you it is
(amount to call) / (amount in pot + amount to call)
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