If i havea 33.33% in the class average grade what willit bring my grade up to if i make 2 100 on 2 tests

Here is an example you could use. (This is how teachers grade work)

First, calculate the percentage you received on the test by dividing your mark by the total marks. For example, if you scored 18 out of 20, then 18/20 = 90 percent. Secondly, multiply your percentage score on the test by the percentage it is worth of the final grade.