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OpenStudy (anonymous):
Thirty is 12% of what number?
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OpenStudy (anonymous):
Set up a proportion. 30/x = 12/100 Solve for x by cross-multiplying.
OpenStudy (the_fizicx99):
12/100 = .12 30/.12 = 250 250*.12 = 30 <-- making sure
OpenStudy (anonymous):
250 after solving for x by cross - multiplying :) ..
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