A businessman allows a discount of $10 \%$ on the marked price. What percent above the cost price must he mark his goods to make a profit of $17 \% ?$
$30$
$20$
$27$
$18$
An article which is marked at $Rs.\, 975$ is sold for $Rs.\, 897$. The $\%$ discount is?
On selling an article for $Rs.\, 170,$ a shopkeeper loses $15 \% .$ In order to gain $20 \%,$ he must sell that article at rupees
A man sold a cow at a loss of $12 \%$. If he had been able to sell it at a gain of $6 \%,$ it would have etched $Rs\,72$ more than it did. What was the cost price?
A man sold two cows at $Rs. \,1995$ each. On one he lost $10 \%$ and on the other he gained $10 \% .$ What his gain or loss percent?
A cab driver makes a profit of $20 \%$ on every trip when he carries $3$ passengers and the price of petrol is $Rs.\,30$ a litre. Find the percentage profit for the same journey if he goes with four passengers per trip and the price of petrol reduces to $Rs.\, 24$ a litre? (in $\%$)
(Assume that revenue per passenger is the same in both the cases.)