In a certain store, the profit is $320 \%$ of the cost. If the cost increases by $25 \%$ but the selling price remains constant, approximately what percentage of the selling price is the profit?
$30$
$70$
$100$
$250$
Some articles were bought at $6$ articles for $Rs.\,5$ and sold at $5$ articles for $Rs.$ $6 .$ Gain percent is
A man bought nine pens for a rupee. How many pens should be sell for a rupee to gain $50 \% ?$
The cost price of $20$ articles is the same as selling price of $x$ articles. If the profit is $25 \%,$ then the value of $x$ is
By selling 80 ball pens for $Rs.\, 140$ a retailer loses $30 \%$. How many ball pens should he sell for $Rs.\, 104$ so as to make a profit of $30 \% ?$
A sells an article to $B$ at $15 \%$ profit. $B$ sells it to $C$ at $10 \%$ loss. If $C$ pays $Rs.\,517.50$ for it then $A$ purchased it at