By selling an article for Rs. 100, a man gains Rs. 20. Then his percentage gain is ?

An article is sold at a certain price. If it at 2/3 of that price, one loses 10%. Find the gain percentage at original price.

An item is sold for ₹ 504 after allowing 20% discount and still a profit of 5% has been earned. The marked price is how much more than the cost price ?

An article is sold for Rs. 2000 with profit of 25%. What would have been the percentage of profit, if it was sold for Rs. 1800?

A chair is sold for $\rupee 96$ at 20% loss. The cost price of the chair is

An article is sold at a certain price. By selling it at 2/3 of that price one loses 10%. Find the gain percentage at original price :

The profit earned after selling an item for ₹ 797 is the same as the loss incurred after selling the same item for ₹ 635. What is the cost price of the item?