A man bought nine pens for a rupee. How many pens should be sell for a rupee to gain $50 \% ?$
$3$
$6$
$7$
$8$
A shopkeeper labeled the price of his articles in order to earn a profit of $30 \%$ on the cost price. He, then, sold the articles by offering a discount of $10 \%$ on the labelled price. What is the actual rate of profit he earned in the deal? (in $\%$)
The cost price of $12$ tables is equal to the selling price of $16$ tables. The loss percent is
Find $CP$ when $SP = Rs.\, 51 .70, \operatorname{loss}=12 \% ?$
If the selling price is tripled and cost price doubled the profit would become $65 \% .$ What is the present profit (in $\%$)?
On a certain item profit is $150 \% .$ If the cost price increase by $25 \%$ what will be the new profit margin $($ in $\%)$