The value of a machine depreciates every year by 5%. If the present value of the machine be Rs 100000, what will be its value after 2 years?

A certain school has 300 students, 142 of whom are boys. It has 30 teachers, 12 of whom are men. What percent of the total number of students and teaachers in the school is female?

Aman’s income is 20% less than that of Anil. How much percent is Anil’s income more than Aman’s income?

The population of a town increases by 10% annually. If the present population is 600000, what will be its population after 2 years?

The population of a town increases by 10% annually. If the present population is 22000, find its population a year ago.