List of top Mathematics Questions on Percentages asked in GAT-B

In an election contested by two candidates, one candidate got 30% of total votes and lost by 500 votes. The total number of votes polled is:
The salary of a worker is first increased by 5% and then it is decreased by 5%. What is the change in his salary?
In a class of 60 students comprising girls and boys, 30% are boys. On a given day 10% of the class is absent and all the absentees are boys. What is the percentage of girls in this class on that given day?
If the price of the sugar is raised by 25%, find by how much percent a homemaker should reduce the consumption of sugar so as not to increase his/her expenditure?