On an article the profit is $210 \%$ of the cost price. If the cost price increase by $40 \%$ but the selling price remains constant, approximately what percent of selling price will be the profit?

A person bought an article for $Rs\,240.$ For how much should he sell it so as to lose $20 \% ?$

By selling an article at $\frac{2}{5}$ of the marked price, there is a loss of $25 \%$. The ratio of the marked price and the cost price of the article is

A vendor started selling vegetables at $Rs. 10$ per $k g,$ but couldn't find buyers at this rate. So, he reduced the price to $8.10 / kg ,$ but uses a faulty weight of $900\, g$ for $1\, kg .$ Find the percent change in the actual price or loss.

A sells an article to $B$ at a gain of $20 \%$ and $B$ sells it to $C$ at a gain of $10 \%$ and $C$ sells it to $D$ at a gain of $12 \frac{1}{2} \% .$ If $D$ pays $Rs.\, 29.70,$ then $A$ purchased the article for (in $Rs.$)

A trader marked his goods at $20 \%$ above the cost price. He sold half the stock at the marked price, one quarter at a discount of $20 \%$ on the marked price and the rest at a discount of $40 \%$ on the marked price. His total gain is.......$\%$