By selling an article for $₹2500$, a man gain $20\%$. Find his gain.

Raza bought a cycle for $₹840$ and sold it for $₹612$ after one year. Find the loss per cent.

If the C.P. of $12$ articles is equal to the S.P. of $8$ articles, find the gain per cent.

If the CP of $4$ articles is equal to the SP of $5$ articles, find the loss per cent.

A shopkeeper sells a water geyser for $₹2370$, gaining $\frac{1}{5}$ of its cost price. Find his gain per cent.

Sameer buys a radio set for $₹440$, and sells it to Varish at a profit of $22\%$. What does Varish pay for the radio set?

A bicycle was sold at a profit of $12\%$. Had it been sold for $₹16$ more, the profit would have been $20\%$. Find the selling price of the bicycle.

By selling a pillow for $₹64$, a shopkeeper loses $36\%$ of his cost. If he sells it for $₹120$. What profit or loss would be there for him? 

A man sold two tables for $₹800$ each. on one gains $20\%$ and on the other he loses $20\%$. Find the gain or loss per cent in the whole transaction.