List of top Quantitative Aptitude Questions on Percentage asked in ATMA

A number is first increased by 20% and the result is then decreased by 20%. The final value is what percent of the original?
The price of sugar rises by 25%. By what percentage must a family reduce its consumption so that the total expenditure on sugar stays the same?
In an election between two candidates, the winner got 56% of the total valid votes and won by 4,800 votes. If all votes were valid, how many people voted?