Essendon ended the 2011 home and away season on exactly the same points for as points against, 2,217, giving them a percentage of exactly 100! And what is the magic formula that the AFL and most leagues use to determine “percentage?” It’s simply the points FOR divided by the points AGAINST, then multiplied by 100!
eg. Richmond Points for 112 Points against 84
112 / 84 = 1.333 1.333 x 100 = 133.33 %
Interestingly, the SANFL uses a different percentage system, where 100% is the pinnacle. The formula?
100 x For / (For + Against)
eg. Glenelg (keep it in the Tiger family) FOR-112 AGAINST 84
100 x 112 / (196) =57.14%
I personally like this system because if the aggregate score between the two teams is 196, then Glenelg’s score of 112 represents 57.14% of the total score. Click here for some further reading on www.sanfl.info