The cost of an article including the sales tax is $Rs.\, 616$. The rate of sales tax is $10 \%$, if the shopkeeper has made a profit of $12 \%$, then the cost price of the article is in $Rs.$?

By selling an article at $\frac{3}{4}^{t h}$ of the marked price, there is gain of $25 \%$. The ratio of the marked price and the cost price is

A trader buys good at $20 \%$ discount on marked price. If he wants to make a profit of $25 \%$ after allowing a discount of $20 \%$, by what percent should his marked price be greater than the original marked price?

If the $CP$ of $50$ items is equal $SP$ of $40$ items then what is the profit or loss $\% ?$

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).

A shopkeeper buys $144$ items at $90$ paisa each. On the way $20$ items are broken. He sells the remainder at $RS.\,1.20$ each. His gain percent correct to one place of decimal is