What final exam grade do I need to maintain my class average?

Lila: What final exam grade do I need to maintain my class average?
Okay so our final exam is worth 15% of our final grade. Right now I have an 82 in the class as an average. What in the minimum I would need to get on the final to maintain my average?
We don’t have midterms at my school. All the marking periods are the same, it’s a high school course.

Answers and Views:

Answer by ThatFeelsGoodInMyMouth
I need more info. (Weight of each marking period, other marking period grades, and midterm weight and grade)