If you have a 99% overall and take a test that's weighted 13%. What grade do you need to get a 90% overall
To calculate the grade you need to get on the 13% weighted test in order to maintain a 90% overall, you can use the following formula:
0.99(0.87) + x(0.13) = 0.9
Where:
0.99 = current overall grade
0.87 = current weighted grade (0.99 - 0.13)
x = grade needed on the 13% weighted test
0.13 = weight of the test
0.9 = desired overall grade
By solving the equation, you can find the grade you need to get on the test:
0.8613 + 0.13x = 0.9
0.13x = 0.0387
x = 0.2977
To convert the decimal to a percentage, multiply by 100:
0.2977 * 100 = 29.77
Therefore, you need to get approximately 29.77% on the 13% weighted test in order to maintain a 90% overall grade.