SOLUTION: If i took a test with 190 points and got 70% of the problems right, how many points did i get wrong?

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Question 386792: If i took a test with 190 points and got 70% of the problems right, how many points did i get wrong?
Answer by armstrkl(28) About Me  (Show Source):
You can put this solution on YOUR website!
If you got 70% right, that means you got 30% WRONG.
You need to find 30% of 190. Solve the proportion:
30%2F100+=+x%2F190 (percent out of 100 = is over of)(30% OF 190 IS x)
5700=100x
57+=+x
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Therefore you missed 57 questions.
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You could also change 30% to a decimal and multiply by 190:
.3+%2A+190+=+57