If the selling price of 40 articles is equal to the cost price of 50 articles, then the percentage gain is:

By selling an article for ₹21, a dealer makes a profit of 20%. By how much should he increase his selling price (in ₹) so as to make a profit of 50%?

A person bought a plot for ₹1,20,000. He sold $$\frac{1}{5}$$​ part of this plot at a loss of 10%. At what profit percent should he sell the remaining plot to earn a profit of 27% on the whole transaction?

Atul bought a bicycle at three-fourth price of its marked price and sold it at 20% more than its marked price. What will be the profit percentage?

The cost price of article A is ₹ 500 more than the cost price of article B. Article A is sold at a loss of 10% and B is sold at a profit of 20%. If there is a profit of ₹200 in the entire transaction, then the cost price of article A is :

A ration shop dealer sells his sugar using weights has 10% less than the true weight and makes a profit of 15%. Find his total gain percentage.

Vinay bought 100 pens (all at same cost price). He sold 40 pens at a profit of 20 percent, 20 pens at a profit of 40 percent and the remaining at the cost price. If he had sold all at a profit of 20 percent, then he would have got Rs. 160 more. What is the cost price of each pen?

A shopkeeper allows a discount of 20% on the marked price. What price must be marked on an article costing ₹3360, so as to make a gain of 25%?