A vendor bought oranges at 20 for Rs.125 and sold them at Rs.90 per dozen. Find his gain or loss percent.

A man bought apples at 10 for Rs. 75 and sold them at Rs.75 per dozen. Find his loss percent.

A vendor bought bananas at 6 for Rs.10 and sold them at 4 for Rs.6. Find his gain or loss percent.

A vendor bought bananas at 5 for Rs. 4 and sold them at 4 for Rs. 5. Find his gain or los percent.

A man bought apples at 10 for 75 and sold them at 75 per dozen.Find his loss percent

Oranges are bought at 6 for Rs. 20 and sold at 4 for Rs. 18. Find the gain or loss per cent.

A fruit-seller buys oranges at the rate of 10 for Rs. 75 and sells them at 8 for Rs. 70. Find his gain or loss per cent.

A shopkeeper bought a chair for Rs. 1440 and sold it for Rs. 1620. Find his gain or loss per cent.