A shopkeeper gains the cost of $8$ metres thread by selling $40$ metres thread. Find his gain percent.
$19$
$20$
$22$
None of these
Find $CP$ when $SP = Rs.\, 51 .70, \operatorname{loss}=12 \% ?$
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 cycle dealer offers a discount of $10 \%$ and still makes a profit of $26 \% .$ What does he pay for a cycle whose marked price is $Rs.\,840$? (in $Rs.$)
A fruitseller sells mangoes at the rate of $Rs.\, 9$ per $kg$ and thereby loses $20 \% .$ At what price per kg he should have sold them to make a profit of $5 \% ?$ (in $Rs.$)
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?