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Question Number 174661 by Mastermind last updated on 07/Aug/22

$$\mathrm{After}\mathrm{being}\mathrm{marked}\mathrm{down}20\mathrm{percent}.$$$$\mathrm{a}\mathrm{calculator}\mathrm{sells}\mathrm{for}\mathrm{\$}10.\mathrm{The}\mathrm{Original}$$$$\mathrm{selling}\mathrm{price}\mathrm{was}?$$

Answered by Rasheed.Sindhi last updated on 07/Aug/22

$$Letoriginalsellingprice=p$$$$Discountedprice:$$$$p-\left(20\mathrm{\%}ofp\right)=\mathrm{\$}10$$$$p-\frac{20}{100}\times p=10$$$$p-\frac{1}{5}p=10$$$$\frac{4}{5}p=10$$$$p=\frac{10\times 5}{4}=\mathrm{\$}12.50$$

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