List of top Quantitative Aptitude Questions on Profit and Loss asked in ATMA

A man sells two articles at Rs. 990 each. On one he gains 10% and on the other he loses 10%. His overall result is:
A trader marks his goods 40% above cost and allows a discount of 25% on the marked price. His profit percentage is:
By selling an article for Rs. 720, a man loses 10%. At what price should he sell it to gain 20%?
A shopkeeper buys an article for Rs. 480 and sells it for Rs. 600. What is his profit percentage?