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If selling price is doubled, the profit triples. Find the profit percent.

66$ \dfrac{2}{3} $
100
105$ \dfrac{1}{3} $
120
Explanation:

Let C.P. be Rs. $ x $ and S.P. be Rs. $ y $.

Then, 3$\left(y - x\right)$ =$\left(2y - x\right)$ $\Rightarrow y $ = 2$ x $.

Profit = Rs. $\left(y-x\right)$ = Rs.$\left(2x-x\right)$ = Rs. $ x $.

$\therefore$ Profit % =$ \left(\dfrac{x}{x} \times 100\right) $% = 100%

$\Rightarrow x $ = 16.

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