6th grade math help me pleaseee

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Acircle has a circumference of 7.850 units. what is its radius?