1.

If the price of an article is decreased by 20%, then to restore its former value the new price must be increased by what percent?1). 302). 503). 204). 25

Answer»

Let, the former value = Rs. x

After DECREASE of 20%, NEW value = Rs.(x - x × 20/100) = Rs. 0.8x

∴ Required increase percentage,

$(\RIGHTARROW \frac{{x - 0.8x}}{{0.8x}} \TIMES 100\%)$ 

⇒ 2/8 × 100%

⇒ 25%


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