UMS is calculated from the raw mark you got.
Scenario TimeSay me and you sat an exam.
Chemistry C1 AQA GCSE.
Each paper is out of 100 UMS but the paper is out of 60 marks.
I will show you last year's UMS graph.
I sit a paper and I get 45.
From the attachment, this equates to 84 points out of 100.
I need 80 out of 100 to get an A.
I got an A.
As are always 80% of the UMS of the paper. Now, you sit the same exam.
You get 53.
This gives you 93 points of UMS, out of 100.
You need 90 out of 100 to get an A*.
You got an A* in the paper
A*s are always 90% of the UMS of the paper. Of course, the graph and the corresponding UMS grades can change.
This depends on how easy or hard the exam is found.
The UMS for
all your exams or coursework are added together to find the overall result.
A* is 90%, A is 80%, B is 70% of the UMS and so on and so forth.
Does that make slightly more sense?
It is hard to get the concept but scenarios do put the context more easily
Note that maybe this year, 45 may get 90 UMS to equate to an A* and 53 gets you even more UMS for an A*.
It all depends on the national exam performance.
NOTE I do not know the UMS or the grade boundaries. The attachments are from June 2015.