Percentage - General Questions

The price of an item is first increased by 25% and then decreased by 10%. What is the net change in price?

A's salary is 20% more than B's. By what percent is B's salary less than A's?

15 is what percent of 100?

A student must get 35% marks to pass. He gets 222 marks and fails by 23 marks. What are the maximum marks?

A student must get 35% marks to pass. He gets 309 marks and fails by 6 marks. What are the maximum marks?