If jack has a 63% as his grade.If he takes a test worth 9% and got 10/10 what would his grade be then?

From your data, 63% + 9% = ?

if the average of class 63/100 and me I got 45 what I got c or A

To calculate Jack's new grade after taking the test worth 9%, we need to consider the current weightage and score as well as the weightage and score of the new test.

1. Start by multiplying Jack's current grade of 63% by the weightage (91% or 0.91 in decimal form) of the previous material: 63% * 0.91 = 57.33%.

2. Next, calculate the grade Jack received on the new test as a percentage of the total weightage of 9%: 10/10 * 9% = 0.9%.

3. Add the weighted scores together to find the new grade: 57.33% + 0.9% = 58.23%.

Therefore, Jack's grade would be approximately 58.23% after taking the test worth 9%.