Info. for win betting %s is available at http://www.propun.com.au/odds_calculator.html

Once this is understood then it will be easy to understand that because there are 3 placegetters, the more over 300% place odds are, the worse they are for the punter.

To calculate what any dollar odds are in % terms divide 100 by the odds.
Eg $2.00 = 50%, $4.00 = 25% and so on.