If the selling price of $\frac{2}{3}$ of a certain quantity of milk be equal to the cost price of whole milk, then what will be the gain percent in this transaction?

Rehaan purchased a bike for $Rs.\,54,000.$ He sold it at a loss of $8 \% .$ With that money, he again purchased another bike and sold that at a profit of $10$ percent. What is his overall loss/profit?

A loss of $19 \%$ gets converted into profit of $17 \%$ when the selling price is increased by $Rs. 162$ . Find the cost price of the article. in $Rs.$

If a stall sell a pizza at $Rs.\, 200$ he makes $20 \%$ loss if he wants to make $10 \%$ profit then at what price (in $Rs.$) should he sell?

A shopkeeper buys an article at $8$ for $Rs\,16$ and sells them at $9$ for $Rs\,20$. What is his gain or loss percent?

A man purchases some oranges at the rate of $3$ for $Rs.\,40$ and the same quantity at $5$ for $Rs.\, 60.$ If he sells all the oranges at the rate of $3$ for $Rs.\, 50,$ find his gain or loss percent (to the nearest integer).