If the selling price of $50$ articles is equal to the cost price of $40$ articles, then the loss or gain percent is
$20 \%$ loss
$20 \%$ gain
$25 \%$ loss
$25 \%$ gain
Ramesh purchased a bicycle for $Rs.\,5200$ and spent $Rs.\,800$ on its repairs. He had to sell it for $Rs.\,5500.$ Find out his profit or loss percent.
A vendor bought toffees at $6$ for a rupee. How many for a rupee must he sell to gain $20 \% ?$
By selling an article at $\frac{2}{5}$ of the marked price, there is a loss of $25 \%$. The ratio of the marked price and the cost price of the article is
A shopkeeper sells notebooks at the rate of $Rs.\,457$ each and earns a commission of $4 \% .$ He also sells pencil boxes at the rate of $Rs.\,80$ each and earns a commission of $20 \% .$ How much amount of commission will he earn in two weeks if he sells $10$ notebooks and $6$ pencil boxes a day?
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