My grad was at a 77% I got a 66% on one of my test that was worth 8.5%. What’s my grade now ?
To calculate your new overall grade, you need to find the weighted average of your previous grade and the grade you received on the test.
Weighted average = ((Previous grade x (100 - Weight of test)) + (Grade on test x Weight of test)) / 100
In this case, your previous grade was 77% (let's call this "P"). The grade you received on the test was 66% (let's call this "T"). The weight of the test is 8.5%.
Weighted average = ((77 x (100 - 8.5)) + (66 x 8.5)) / 100
Weighted average = ((77 x 91.5) + (66 x 8.5)) / 100
Weighted average = (7045.5 + 561) / 100
Weighted average = 7606.5 / 100
Weighted average ≈ 76.07%
Therefore, your new overall grade is approximately 76.07%.