What are all the common factors of 24 64 and 88

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

Explain how you can use the associative property to evaluate (7x50)x4.

Can someone me find the original price? the discount is 5% and the sale price is $68.40