The printed price of an article is $40 \%$ higher than its cost price. Then the rate discount so that he gains $12 \%$ profit is.........$\%$
$15$
$21$
$18$
$20$
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?
An article is sold at a profit of $20 \%$. If both the cost price and selling price are $RS.\, 150$ less, profit would be $5 \%$ more. Find the cost price.
If $5 \%$ more is gained by selling an article for $Rs.\, 350$ than by selling it for $Rs$ $340,$ the cost of the article is......$\%$
The cost price of $6$ pens is equal to the selling price of $4$ pens. Find the profit percent.
The cost price of $40$ articles is the same as the selling price of $25$ articles. Find the gain percent.