Question 4
The price of a cell phone is decreased by $$25\%$$. What percentage increase in the decreased price is required to restore the original price?
Solution
Assume the original price is $$100$$. After a $$25\%$$ decrease, the price is $$75$$, and the required increase is $$25$$. Therefore, the percentage increase is $$\frac{25}{75}\times100=33\frac{1}{3}\%$$.
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