If you have a 99% and have a test that's weighted 13%. What percentage do you need to get on the test to keep a 97%.
To calculate what percentage you need to get on the test to maintain a 97%, you can use the following formula:
((Current Average * Current Weight) + (Grade on Test * Test Weight)) / Total Weight = Desired Average
Plugging in the values given:
((99 * 0.87) + (Grade on Test * 0.13)) / 1 = 97
Solving for Grade on Test:
(86.13 + 0.13 * Grade on Test) = 97
0.13 * Grade on Test = 10.87
Grade on Test = 10.87 / 0.13
Grade on Test = 83.3
Therefore, you would need to get at least an 83.3% on the test to maintain a 97% overall grade.