Question 1006403
100% - 72% correct = 28% wrong.


14 wrong is equal to 28%.


x is the number of problem on the test.


.28 * x = 14


divide both sides of this equation by .28 to get x = 14/.28 = 50


there are 50 problems on the test.


14 / 50 = .28 * 100 = 28%.


100% - 28% = 72%


28% wrong
72% right