How calculate your score for CAE?

[Maria80]

Hi everyone!
I am preparing for CAE on Cae Practice Test by Cambridge University press.
I know that in order to get A, B or C as final mark you have to gain 81% to 100%, 76% to 80%, 60% to 75%.
To know what meark I get in each Test, I do like that.
I calculate the percentage of each paper of each test (e.g. Paper 1 of Use of English) in cents and then I calculate the average of all the papers within Use of English test.
So I guess I can know if I gain A. B or C.
Does anyone of you know wheter this is right?

Thanks!!!

Hear from you!