If on selling $12$ note books, a seller makes a profit equal to selling price of $4$ notebooks. What is his percent profit?
$16 \frac{2}{3}$
$25$
$50$
Data inadequate
While selling a watch, a shopkeeper gives a discount of $15 \% .$ If he gives a discount of $20 \%,$ he earns $Rs.\, 51$ less as profit. What is the original price of the watch? (in $Rs$)
The marked price of a clock is $Rs.\,3200.$ It is to be sold at $Rs$ $2448$ at two successive discounts. If the first discount is $10 \%$, then the second discount is.........$\%$
The cost price of an article is $80 \%$ of its marked price for sale. How much percent does the tradesman gain after allowing a discount of $12 \% ?$
A man bought nine pens for a rupee. How many pens should be sell for a rupee to gain $50 \% ?$
A man bought apples at the rate of 6 for $Rs.\,20$ and sold them at $4$ for $Rs.\, 16.$ His estimated profit $\%$ is