CSAT - Qa - Percentages - 1

Due to reduction of price of petrol by 30%, a customer can buy 15 litres more  more for the same amount. Find the original quantity of petrol he used to buy

Raju invested 20% of his money in mutual funds, 20% of the rest in gold and spent 25% of the remaining for his kids school fees. What percentage of the original sum was he left with?

In a class of 300 students, the number of boys is twice that of girls. If 50% of the boys and 48% of girls appear in the examination, how many students did not appear?

If the length and breadth of a rectangle is increased by 10% and 50% respectively. Then the percentage increase in the area of the rectange is

In a village, 18% of the population is children and 10% of the children are female. If the number of female children is 90, then what is the population?

If the radius of a circular region were decreased by 30 percent, the area of the circular region would decrease by what percent?

30% of the students in a class wear shoes, 20% of the students, who wear shoes, wear Nike shoes. If the class has 300 students then how many wear Nike shoes?

Peter got 30%, of the maximum marks in an examination and failed by 10 marks. However, Paul who took the same examination got 40% of the total marks and got 15 marks more than the passing marks. What was the passing marks in the examination?

Rajan got an increment of 25 % on his salary at the start of the year 2007. But 2008 being a recession year the company cut the salaries of all employees by 10% by the end of the year. What was the net percentage change in his compred to 2006 end and 2009 start.   

Milk contains 80% water and 20% solid. If 50% of the water is evaporated from milk after boiling it for 15 mins, then what will be the percentage solid in the boiled milk.