By selling an umbrella for $Rs.\, 300,$ a shopkeeper gains $20 \%$. During a clearance sale, the shopkeeper allows a discount of $10 \%$ on the marked price. His gain per cent during the sale is
$7$
$7.5$
$8$
$9$
An article is sold at a gain of $15 \% .$ Had it been sold for $Rs.\,27$ more, the profit would have been $20 \%$. The cost price of the article is (in $Rs.$)
A man buys an article for $Rs.\;27.50$ and sells it for $Rs.\, 28.60.$ Find the gain percent?
The value of an article depreciates every year at the rate of $10 \%$ of its value. If the present value of the article is $Rs.\, 729$, then its worth $3\, years$ ago was (in $Rs.$)
The printed price of an article is $40 \%$ higher than its cost price. Then the rate discount so that he gains $12 \%$ profit is.........$\%$
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.)