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 ___________.

If the length of a rectangle increases by 50% and the breadth decreases by 25%, then what will be the percent increase in its area?

A man spends of his income. If his income increases by 14 % and the expenditure increases by 20%, then the percentage increase in his savings will be

Ram sells two articles, each for the same price Rs.720. He incurs 20% loss on the first and 10% loss on the second. Find his overall percent loss.

The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?

A student multiplies a number by 5/3 instead of 3/5. What is the percentage error in the calculation?

A seller uses 920 gm in place of one kg to sell his goods. When he sells his articles at 15% gain on cost price, the actual percentage of profit is :

The value of a machine depreciates at the rate of 10% per annum. It was purchased 3 years ago. If its present value is Rs.53071.20, the purchase price of the machine was: