Find what grade you need on the final:

%

%

Final weight:
%

#### Example #1

Current grade is 70% (or C-).

Final exam weight is 50%.

Required grade is 80% (or B-).

##### Calculation:

The final exam grade is equal to 100% times the required grade, minus 100% minus the final exam weight (w) times the current grade (g), divided by the final exam weight (w):

= ( required grade - (100% - wcurrent grade ) / w

= ( 80% - (100% - 50%)×70% ) / 50% = 90%

So the final exam grade should be 90% (or A-).

#### Example #2

Assigment 1: weight1=50%, grade1=16 out of 20.

Find average grade in assignments 2 and 3 needed to get class grade of 85%.

##### Calculation:

Final exam weight = w = weight2+weight3 = 30%+20% = 50%

= ( required grade - (100% - wcurrent grade ) / w

= ( 85% - 50%×80% ) / 50% = 90%

This mean that you have to get an average grade of 90% in assignments 2 and 3 in order to get class grade of 85%.

Assignment 2 grade = 90% × max grade = 90% × 30 = 27

Assignment 3 grade = 90% × max grade = 90% × 40 = 36