How many questions do you have to miss to get a 78 percent on a 32 question test?

Answer 1

Assuming each question is worth 1 mark, 78% of 32 = 78/100 × 32 = 24.96

As it is unlikely that you will get 0.96 of a question/mark, you will need to get 25 questions right to guarantee getting 78% - you will actually get 78⅛ % which would be rounded to 78% to the nearest whole percentage.

Answer 2

If all the questions are worth the same score then you cannot get 78% on a 32 question test.