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pdk1010
Old 05-08-2009, 03:50 PM     Post subject: math #1 (permalink)  
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I dont understand why i cant do this but i cant grasp the concept of expressing a percentage in odds form i.e. 34% into a x to 1 odd.
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Erpel
Old 05-08-2009, 03:59 PM #2 (permalink)  
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If odds of something are 1:1 that means that it's as likely to happen as it is not to happen.

If odds of something happening are 2:1 that means one outcome is twice as likely as the other outcome.

The former in % notation is a 50-50 (or 50%) chance. The second in % is a 67-33 (67% or 33% chance of happening, where you normally focus only on one output that is more interesting to you than the other.

2:1
2+1 = 3
1/3 = 0.33 = 33%
2/3 = 0.67 = 67%

3:1
3+1 = 4
1/4 = 0.25 = 25%
3/4 = 0.75 = 75%
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Stacks
Old 05-08-2009, 04:02 PM #3 (permalink)  
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Stacks will become famous soon enoughStacks will become famous soon enough
 If you have a 34% chance of winning, that means you will lose 66% of the time. So 66:34 or approx 2:1.

If you have a 25% chance of winning, that means you lose 75% of the time. Therefore, 25% in a ratio is 3:1.

To go the other way from ratio to percentage is easy as well. Say you have a 4:1 chance of hitting your card, while it's easy to memorize that this is 20%, you can also do the math by taking whats on the right side of the ratio and dividing it by the sum of both sides. So 4:1 would look like 1 / (1 + 4) = 1/5 = 20%.
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Erpel
Old 05-08-2009, 04:03 PM #4 (permalink)  
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Erpel
34% = 34/100 = 17/50
50 = 33 + 17
33:17

22% = 22/100 = 11/50
50 = 39 + 11
39:11

10% = 10/100 = 1/10
10 = 9 + 1
9:1

45% = 45/100 = 9/20
20 = 11 + 9
11:9
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Sasquach991
Old 05-08-2009, 08:57 PM #5 (permalink)  
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I think the other guys have answered your question.

Overheard in the Pokerstars chat:

Villian: If I'm 3:1 on winnin' some hands, what's that in percent?

Hero: Ok, you will win 3 out of 4 hands. How many will you win out of 100 hands?

Villian: I wasn't planning on playin' that many hands

Hero:
"Just cause I'm from the South don't mean I ain't got no book learnin'"

Quote:
Originally Posted by a500lbgorilla View Post
...we've all learned long ago how to share the truth without actually having the truth.
 
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bb2
Old 05-10-2009, 12:30 PM     Post subject: odds calc #6 (permalink)  

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bb2
Have you tried to use odds calc', it will make your poker game easier!
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Parasurama
Old 05-10-2009, 06:50 PM #7 (permalink)  
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You already have it in odds form if you have the percentage. Express the odds as X%100-X)% and divide both by the smaller number. In your example, it would be 34:66 odds, dividing both by 34 you get 1:1.94
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