A retailer gets a discount of 40 % on the printed price of an article. The retailer sells it at the printed price. His gain percent is 

A student has to score 33% marks to pass. He gets 117 marks and fails by 81 marks. Find the student’s marks percentage?

Last financial year, a car company sold 41,800 cars. The target is to sell 51,300 cars this year. What percentage would sales have to increase?

A reduction of 20% in the price of rice enables a man to buy 5 kg more for Rs.100. The price of the rice before reduction was-

If a number is increased by 30 % and after that it is decreased by 25 % and again it is increased by 25 % then find average change in percentage? (approx.) 

The radius of circle is increased by 1%. How much does the area of the circle increased? 

If the diameter of a wire is decreased by 10% by how much per cent (approximately) will the length be increased to keep the volume constant?

P is 20 percent more than Q and Q is 30 percent less than R. If P is 420, then What is the value of R?