70% of x is 63. Write an equation that represents this statement.

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

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m