A shopkeeper marked the selling price of his goods in such a way that after giving a discount of 10% he gains 17%. How much per cent above the cost price is the marked price?

C.P. of the article = Rs. 100 and marked price

= Rs. x

$\therefore x \times \frac{90}{100}=117$

$\Rightarrow x=\frac{117 \times 100}{90}=130=30 \%$ above C.P.