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Mathematics 13 Online
OpenStudy (anonymous):

The price of a notebook has dropped to $3.30 today. Yesterday's price was $3.80 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.

OpenStudy (anonymous):

15.2 % Completed by dividing 3.80 by 3.30.

OpenStudy (anonymous):

Let $3.80 be 100%. Now consider $3.80 - $3.30=$0.50. Divide $0.50 by $3.80 to get 0.1315 . . . This number, when multiplied by 100%, gives the percentage you're after: 13.15 . . .%, which is 13.2% when rounded.

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