A man buys $10$ oranges for a rupee and sells $8$ oranges for a rupee. What is the profit percent?
$10$
$12.5$
$20$
$25$
Find $CP$ when $SP = Rs.\, 51 .70, \operatorname{loss}=12 \% ?$
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.
Oil equal to $20 \%$ of the weight of ground nut is extracted in a mill. The matter left after extraction is sold as cattle feed at the rate of $Rs.\, 12.5$ per $kg$. The ground nuts are bought at $Rs.$ $20$ per $kg.$ the processing cost is $Rs.\, 5$ per $kg$. At what price $(Rs.$ per $kg$ ) should the oil be sold to earn $20 \%$ profit on total costs (Total cost $=$ cost of groundnuts and processing costs)?
A rice trader buys $16$ quintals of rice for $Rs.\, 5632$. $20 \%$ rice is lost in transportation. At what rate should he sell to earn $25 \%$ profit in $Rs.$ per quintal?
The $CP$ of $19$ article is equal to the selling price of $15$ article. Gain $\%$ is?