SSC CGL Model Paper 14

Let the marked price and cost price of the article be x and 100, respectively.
According to the question,
$\mathit{x}\times \frac{75}{100}=100\times \frac{85}{100}$
$\therefore \mathit{x}=\frac{340}{3}$
If the article is sold at marked price.
Hence, required profit $=\frac{\frac{340}{3}-100}{100}\times 100$ = 13.33%