The difference between the value of the number increased by 20 % and the value of the number decreased by 25 % is 36. Find the number. 

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?

A student got 30% marks in an examination and failed because he got 12 marks less. Another student got 40% marks in the same examination and got 18 marks more than the minimum passing marks. Must have marks to pass

What percentage of the whole week does Ajay spend in office, if his office hours are 9 am to 5 pm from Monday to Friday? 

If a number x is 10% less than another number y and y is 10% more than 125, then x is equal to-

A boy scored 125 marks and 140 marks in the first test and the second test respectively. If the maximum mark in each test is 150, then the percentage increase in his performance is ___________.

In an examination, 93 % of students passed and 259 failed. The total number of students appearing at the examination was: 

By reducing the circumference of a circle by 50 percent, by what percentage will its area decrease?