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

$\begin{array}{l}Let\text{\hspace{0.17em}the\hspace{0.17em}}C.P=xRs\\ S.P=yRs\\ \text{then,profit}=(y-x)Rs\\ IfS.P=2y,\text{then\hspace{0.17em}profit}=3(y-x)Rs\\ \text{Given\hspace{0.17em}}2y-x=3(y-x)\\ y=2x\Rightarrow S.P=2\times C.P\Rightarrow \text{Profit\hspace{0.17em}\hspace{0.17em}is\hspace{0.17em}\hspace{0.17em}}100\%\end{array}$