SOLUTION: If I have a 66% grade overall, and I get an 80 on a test that's 20% of my grade, what's my new grade?

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Question 823736: If I have a 66% grade overall, and I get an 80 on a test that's 20% of my grade, what's my new grade?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
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80*66 + 20*80 = 100g
g = (80*66 + 20*80)/100
g = 68.8%
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