If the cost price of $21$ watches is equal to the selling price of $18$ pieces, then what would be the gain percent in this transaction?
$6 \frac{1}{2}$
$7$
$16 \frac{2}{3}$
None of these
The profit earned by selling an article for $Rs.\, 900$ is double the loss incurred when the same article is sold for $Rs.$ $450 .$ At what price should the article be sold to make $25 \%$ profit in $Rs.$?
Seema sells a pen to Sapna at a profit of $25 \% .$ Sapna sells it to Asha at a profit of $10 \%$ and Asha sells it to Kavita at a profit of $5 \%$. If Asha sells it for $Rs.\,231,$ find the cost price at which Seema bought the pen? (in $Rs.$)
Aditya purchase a book with a $20 \%$ discount on the marked price. How much $Rs.$ did he pay if the book marked was $Rs.$ $500 ?$
Hundred oranges are bought at the rate of $Rs.\, 350$ and sold at the rate of $Rs.\, 48$ per dozen. The percentage of profit or loss is
A shopkeeper professes to sell his goods at cost price but uses a $930$ $gm$ weight instead of $1$ kilogram weight. What will be the profit per cent of the shopkeeper?