Ethan correctly answers 80% of the total questions on his history test. enter the number of questions on ethan’s history test.

It might be about 20 questions

Since you didn't give me a total # of questions on the test, I can't give you a direct answer 

But I can walk you through.

In math, "of", means you have to multiply. 

80%= .8  This is bc 100% is = 1.00. 
() mean times or multiplied by

So you would do .8(how ever many total questions were on the test)
Whatever # you get is the answer. 

Hope I could help!!!