The cost price of 19 articles is same as the selling price of 29 articles. What is loss percentage?

Answer: Option C

Let CP of each article be Rs. 29 and SP of each article be Rs. 19
Loss Percentage
$$\begin{array}{rl}& =\frac{\left(29x-19x\right)\times 100}{29x}\\ & =34.48\%\end{array}$$