A dishonest shopkeeper deceives by $15\%$ at the time of purchase of the articles and also $15\%$ at the time of the sale. Find out the percentage of profit.

A dealer makes his goods $30\%$ above cost price. But a reduction of $6\frac{1}{4}\%$ on the marked price for ready money. Find his gain percent?

A tradesman by means of a false balance defraud to the extent of $10\%$ in buying goods and also defraud $10\%$ in selling. What percent does he gain on his outlay by his dishonesty?

Mohan sells two horses for$Rs. 1955$each. On one of them he gains $15\%$ and on other he losses $15\%$. Find his total gain and loss.

A grocer mixes $26 kg$ of tea which costs him $Rs 2.00/kg$ with $30 kg$ of tea which costs $Rs.3.6/kg$ and sells the mixture at $Rs. 3.00/ kg.$ What is his total percentage of gain?

A shopkeeper estimates his profit at $22\frac{1}{2}\%$ of the cost price. If his sale in one week was of $\mathrm{Rs}. 392$. How much of this was his profit?

A house was sold for $\mathrm{Rs}.12600$ at a profit of$5\%$ on the cost price. What percent would have been gained if it had been sold for   $\mathrm{Rs}.13000$?