college
posted by Anonymous .
370 papers need gradeed only 80% of them get done. How many ungraded papers will remain to be completed?

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multiply 370 by 0.8 (80% = 0.8)
subtract that result from 370
What do you get? 
a quicker way to do is multiplying 370 by .20 (20% of the paper needed not to be graded)
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