Ethan correctly answer 80% of the total question on his history test. He correctly answer 32 question.

Question

He correctly answer some 32 question

Answer 1

My favorite approach is the proportion formula:

 

Part / Whole  =  %  / 100

Plug in the values you have:

32 / W  = 80 / 100

Cross-multiply (always the first step with this method)

32 * 100  = 80 * W

3200   = 80W

Now divide, which is always the second step:

3200 / 80 = 80W / 80

   40      =   W

There you go! Not so difficult after all...