SOLUTION: if my average is an 86 and I make a 57 on a quiz grade, what's my new average?

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Question 969070: if my average is an 86 and I make a 57 on a quiz grade, what's my new average?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
If the quiz is worth x percent of your total grade, the new average would be,
A=86%281-x%2F100%29%2B57%28x%2F100%29