Quote Originally Posted by guiltyjoe
That is a great help. I have a follow up question though...

How do you figure out percentages PRE FLOP?

Again, thanks in advance.
You determine them exactly the same way; by looking at all the possible 5 card boards and each player's pot equity for each of those boards. And, again, for humans this is virtually impossible due to the number. If you knew your 2 hole cards and your opponent's two hole cards, then there would be 1,712,304 possible boards. You would weight those based on win/lose/tie to compute that percentage.

As each specific problem is essentially intractable with just a human brain at your disposal, here are some common guidelines:

Overpair vs Underpair: :As: :Ac: vs :Qs: :Qc:
80% vs 20%

Overpair vs Under non-pair: :As: :Ac: vs :Qs: :Jc:
85% vs 15%

Pair vs Highcard match non-pair :Ts: :Tc: vs :Td:
90% vs 10%

Pair vs Lowcard match non-pair: :Ts: :Tc: vs :Kh: :Td:
70% vs 30%

Pair vs Over/Under non-pair: :Ts: :Tc: vs :Qd:
70% vs 30%

Pair vs Over non-pair: :Ts: :Tc: vs :Qc: :Jd:
55% vs 45%

Over non-pair vs Under non-pair: :Qs: vs
65% vs 35%

Interleaved non-pairs: :Qs: vs :Tc:
65% vs 35%

Non-pair vs interstitial non-pair: :Qs: vs :Jc:
60% vs 40%

Non-pair vs non-pair matching highcard: :Ac: :Td: vs :As:
70% vs 30%

Non-pair vs non-pair matching lowcard: :Ac: vs :Kh:
70% vs 30%

In each of these cases, if a hand is suited it gains a few percent vs an unsuited hand. Also, if unpaired hands are close enough to be in the same straight then they gain a few percent. And finally, due to things like straights and counterfeiting, some of the numbers can change quite a bit if the cards are bumped up against the top or bottom of the ranks.