Asked by Carrie

Lindsey has 75% as her final grade, but after she writes her exam she gets 85%.
If her exam is worth 7.5%, what is her final grade.
Answered by Ms. Sue
Multiply 75 by 0.925.
Multiply 85 by 0.075.

Add the two products together to get her final grade.
Answered by Carrie
Thanks but,I don't understand, because
75x0.925= 69.375
85x0.075= 6.375

69.375 + 6.375= 75

How can that be right? Where did you get 0.925 from. Isn't her final grade going to go up after her 85% on the exam.

Answered by Salina
Don't you take 75x0.075= 6.375
then add that to her final grade of 75% to get 81.375?
Answered by Ms. Sue
I got the 0.925 by subtracting 0.075 from 1.

By my calculations, the grade only goes up from 75 to 75.75. Rounded to the nearest percent = 75.75 = 76. A final grade of 76% makes sense because the exam is only a small part of the final grade.

Answered by Ms. Sue
No, that's not correct.

75% is an average of all of the work that she did during the semester.
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