SOLUTION: A filing cabinet contains 200 standard files. When 50 files have been stored in the cabinet, what percent of the filing cabinet is being used?

Question 313150: A filing cabinet contains 200 standard files. When 50 files have been stored in the cabinet, what percent of the filing cabinet is being used?
Answer by OmniMaestra(21) (Show Source): You can put this solution on YOUR website!
Percentage problems can usually be set up as a proportion. A proportion is two equal ratios

so set the problem up, the part is 50, the whole is 200:

cross-multiply:

divide by 200:

so the answer is 25%
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