I was wondering how does sac weighting affect your ranking? If one outcome is weighted less, how do they rank you?

They don't combine rankings from sacs if that is what you are asking. Your ranking in a single sac is not that relevant. E.g. it is possible to never rank 1 any sac and end up being the overall rank 1.

The simplest explanation I can think of is that at the end of the semester all the sacs are reduced down or scaled up to a total of 100 marks.

So e.g. for simplicity you have two sacs in a semester one worth 40% and one worth 60%.

So imagine each sac is 25 marks. A student gets 15/25 for the 40% sac and 20/25 for the 60% sac.

You would then find how much of the 40% and 60% was obtained by the student.

E.g. 15/25 x 40 = 24

E.g. 20/25 x 60 = 48

So the final mark out of 100 will be 72.

This will be done for all students and they will be ordered fro highest to lowest and ranked.