How are the Percentages calculated???

[Rogger]

Hi, although i have a strong rugby league/union background, i am a sports lover in general, and have been following AFL for several seasons now, but have only decided to become a serious supporter this yr after responding to a challenge from an AFL mad friend. She has set me a challenge to find out as much as i can about AFL, which i have done, but the one thing i dont understand is, how are the percentages calculated??? My friend would not tell me so if anyone could explain this to me i would really appreciate it.
Thanks
Rogger

 

[Indian]

Number of points scored divided by number of points conceded, accumulated throughout the season.

eg) TEAM A 15.10.100 defeats
opposition 13.9.87

TEAM A percentage = 100 divided by 87 = 114.9%

 

[WCE2000]

the amount of points a team scores in a season
divided by
the amount of points a team concedes
multiplied by 100

 

[A. Pedant]

The SANFL has a more accurate method:

Points for x 100
-------------------------
Points for + points against

EG 18.12(120) to 12.8(80) the winning team's percentage is 60 and the losing team's is 40.

It shows you what percentage of the scoring a team has achieved in their matches. So, 100% can only be achieved if your opposition fails to score, and obviously you can't do more than 100% of the scoring in a match

 

[WCE2000]

Originally posted by A. Pedant:
The SANFL has a more accurate method:

How is the SANFL's way more accurate, it is exactly the same.

The Victorian way is basically how many points a team scores when the opposition scores 100.

The SANFL way is basically how many points a team scores out of every 100 points their involved in.

By law of maths (sorry to sound like a nerd), if you went through every single SANFL ladder, and changed the percantages and worked them out the VFL/AFL way, you would still have the exact same ladder every year.

And if you went through every VFL/AFL ladder, and worked out the percantages the SANFL way, you would have the exact same ladder every year.

So how is the SANFL's way of calculating percantages more accurate.

 

[*Paul*]

In a lot of sports a 20pt win affects the "percent" (pts difference) no matter what the score. But in the AFL a 100-80 win is better than a 120-100 win. Is this on purpose or did just happen that way?

 

[EaglesFlyingHigh.com]

Originally posted by *Paul*:
In a lot of sports a 20pt win affects the "percent" (pts difference) no matter what the score. But in the AFL a 100-80 win is better than a 120-100 win. Is this on purpose or did just happen that way?

don't know if it was planned or just happened that way - but it is a good thing.

look at a couple of the games from the weekend:
North Melbourne won by 20 points 53 to 33
West Coast won by 24 112 to 88

even though it was less points, the Roos had a bigger win in the sense that it was clear by the last quarter that they would win. because of the conditions there was no way Geelong could make up that gap in the last quarter.

in the dry, high scoring Eagles/Dockers match the 24 point margin could been made up in just a few minutes, so the game wasn't sealed until very late in the last quarter. so in that sense the Eagles/Dockers game was closer.




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jeff...
EaglesFlyingHigh.com

 

[Olmy]

The percentage is worked out by the same group of people who determine the winners and losers every week.

A small group of people (including a few aliens like Frodo), get together in a small room, somewhere within AFL headquarters. They then set about, working out the results for the week, as well as the percentages that should accompany them.

I believe these same people are also responsible for deliberating on umpiring decisions.

 

[Olmy]

Originally posted by *Paul*:
In a lot of sports a 20pt win affects the "percent" (pts difference) no matter what the score. But in the AFL a 100-80 win is better than a 120-100 win. Is this on purpose or did just happen that way?

It's just a "law" of maths. As the title "percentage" is relevant in this case, 100 out of 120 (5 sixths), is a greater percentage, than 80 is out of 100 (4 fifths).

It's all in the maths, really.

 

[Olmy]

Originally posted by A. Pedant:
The SANFL has a more accurate method.

If you don't mind me asking, why do they bother??

The method itself, is not any better or worse than any other method, but why is it that they "choose" to be different?

Has it always been this way? Does any other major league in Australia use this method (I assume there would be a few minor ones that do)?

I'm not bagging the method, but it just seems strange that they would bother to have something different. Or perhaps I am just to accustomed to the VFL/AFL method (which is the only one I have really ever taken notice of - and is used in all the local leagues in my area).

 

[*Paul*]

Originally posted by Olmy:
It's just a "law" of maths. As the title "percentage" is relevant in this case, 100 out of 120 (5 sixths), is a greater percentage, than 80 is out of 100 (4 fifths).

It's all in the maths, really.

But what I was trying to say, "Is the fact that the system is weighted to favour sides that concede lower scores, rather than just who wins by the most, deliberate?"

 

[A. Pedant]

Originally posted by Olmy:
If you don't mind me asking, why do they bother??

The method itself, is not any better or worse than any other method, but why is it that they "choose" to be different?

Has it always been this way? Does any other major league in Australia use this method (I assume there would be a few minor ones that do)?

I'm not bagging the method, but it just seems strange that they would bother to have something different. Or perhaps I am just to accustomed to the VFL/AFL method (which is the only one I have really ever taken notice of - and is used in all the local leagues in my area).

It's been done that way in SA for at least 35 years, probably longer. I imagine most leagues in SA do it this way. You know what SAliens are like - they wouldn't want to do anything the same as the Vics

Note - in SA it's only 2 premiership points for a win, one for a draw - also the most sensible way of doing things.

 

[EaglesFlyingHigh.com]

Originally posted by *Paul*:
But what I was trying to say, "Is the fact that the system is weighted to favour sides that concede lower scores, rather than just who wins by the most, deliberate?"

I'd say the answer is "No". But I don't know for sure, and since the system has been used for about 150 years there's probably no-one who does.


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jeff...
EaglesFlyingHigh.com

 

[Olmy]

Originally posted by A. Pedant:
Note - in SA it's only 2 premiership points for a win, one for a draw - also the most sensible way of doing things.

Do they still roll the pavements and roads up at night to stop people from escaping across the border to Victoria??

 

[Jars458]

Originally posted by Olmy:
Do they still roll the pavements and roads up at night to stop people from escaping across the border to Victoria??

No-one would want to come over - I can assure you.

At least our Police force doesn't shoot people dead first and aske questions later.

By the way, What's Jeff Kennet up to these days??



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"That'll do, THAT will do...Unbelievable Darren"
Bruce... September 1997

 

[Barry131166]

There is a very simple way of working out a teams percentage which takes no more than about 2 weeks to do,

Firstly take the following score line as an example

team A scores 20 20 140
team B scores 10 10 70

Now take the total number of goals kicked in this case 30 goals
muliply this by 1000 which = 30,000
now divide this by 500 = 60

used the following formula

60 * 10 = 600
600 * 5 = 3000
3000 / 100 = 30
30 * 6 = 180

now save that number 180

take the behinds scored
in this case its 30
and do the following

30 * 10 = 300
300 / 2 = 150
150 - 120 = 30

so now there are two numbers left
180 and 30

add these two numbers together

180 + 30 = 210

take teams B score from the total
210 - 70
= 140
now we have worked out team A's score
so we have the following

Team A 140
Team B 70

now take a cup of milk add one egg and mix together until the milk turns yellow,
leave this outside for 2 weeks and add 140 numbers (i use pieces of paper)

after the two weeks is up take out the paper and count how many numbers are left

the first amount of numbers you count is team A's Percentage which is 200
turn the paper over and count the number of pieces of paper left there it should be 42

now add those numbers together
242
subtract 32 for the time it takes to sell a slab of beer to a chinese dude at safeway

so we are left with the number 210

take the 42 left from the 210
and the final percentages should be

A 200 %
b 50 %

or there is a harder way to do this which I would not recommend

take team a's score 140 and divide it by team b's score which equalls 200%
take team b's score 70 and divide it by team
a's score which equalls 50%
this is the long and wasteful way to obtain a teams percentage,
method one is the sure fire way to do it

J.L.S MathsMan 2000 Program
Mircosoft Foundation Sponsered
Programing by Mircosoft
and Graphics ,Audio by the deaf and Blind foundation of West Africa

thank you

 

[Mouldy Oldie]

Barry,
Thank you, thank you, thank you. I don't think I've laughed so much & for so long in one session. The lead up from the other contributors to your post made this all the more humourous, & this will go down as one of the best posts ever. I'll look forward to reading some more of your efforts in the future. I doubt that they will ever top that one though. Hope the poor dude who required an explanation of the percentage system isn't turned off our great game.