Mahesh paid Rs. 16,000 to buy 25 pieces of an article. At what price per article should he sell so that profit earned is 40%?

A farmer purchased a piece of land for Rs. 18 lakh and spent Rs. 3 lakh for registration, fencing etc. He sold it for Rs. 24.57 lakh. Find his profit in percentage.

A trader bears a loss of $25\%$ By selling $40$ Needles for a rupee. How many needles should he sell for a rupee in order to earn a profit of $20\%?$

Tina sold an item for $Rs.1500$ at a profit of $25\%$. At what cost will she have to sell it to get a profit of $45\%$?

A man sold an article for $₹7200$ after bearing a loss of $\frac{1}{4}th$ of this cost. The cost of the article is

A man who makes a profit of $25\%$ by selling tea at $₹ 4.25$ per $\mathrm{kg}$ lowers his price, to earn a profit of only $17$ paise per $\mathrm{kg}$.

In what ratio must his sales increase so that the profit may be same $\mathrm{kg}$ as before$?$

What will be the gain or loss percent, if the cost price of $20$ articles equals the selling price of $30$ articles?

Meera purchased $23$ bracelets at the rate of $Rs.160$ per bracelet. At what rate per bracelet should she sell the bracelets so that profit earned is $15\%$?