The cost price of an article is $64 \%$ of the marked price. The gain percentage after allowing a discount of $12 \%$ on the marked price is........$\%$

An item costing $Rs.\, 200$ is being sold at $10 \%$ loss. If the price is further reduced by $5 \%,$ the selling price will be (in $Rs.$)

A man gains $15 \%$ by selling a calculator for a certain price. If he sells it at the triple the price, then what will be the profit percentage?

A shopkeeper purchased $150$ identical pieces of furniture at the rate of $Rs.\, 250$ each. He spent an amount of $Rs.\, 2500$ on packing. He fixed the price of each each furniture at $Rs.\, 320$. However, he decided fe give a discount of $5 \%$ on the labeled price. What is the percent profit earned by him?

Harkesh bought a certain quantity of tomato at the rate of $Rs.\,1500$ per quintal. $10 \%$ of the tomato was spoiled. At what price in $Rs.$ per quintal should he sell the remaining to gain $20 \%$ of his outlay?

A man bought nine pens for a rupee. How many pens should be sell for a rupee to gain $50 \% ?$