Percentage - General Questions

What is 24% of 820?

97.5 is what percent of 780?

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 40% marks to pass. He gets 211 marks and fails by 29 marks. What are the maximum marks?