16 of them.
You can get 60 questions wrong, which leaves you with 140 answers correct, giving you 70%.
80% = 0.80.8 x 50 = 40
The answer depends on how many of the ones that you do are correct and whether there are any penalties for wrong answers.
If there are 85 questions, a passing grade of 80% would be 68 correct answers.
The preferred wording would be, "what percent".
80% of 20 = 20*80/100 = 16
41 = 82%, 42 = 84%...
138 correct answers. 138/150=92
You can get 60 questions wrong, which leaves you with 140 answers correct, giving you 70%.
x/30 = 0.93 x = 28 questions
80% = 0.80.8 x 50 = 40
x/30 = .87 x = 26 questions
Assuming that you get all your answers correct (can you rely on that?), you can miss 12.
Seventy to eighty percent of all leprosy cases are of the Seventy to eighty percent of all leprosy cases are of the tuberculoid type.
You can miss out 12 but: you must get all the remaining correct and there must be no penalties for wrong answers.
The answer depends on how many of the ones that you do are correct and whether there are any penalties for wrong answers.
Ballpark answer - 36 It would mean a retake. Graduate programs are not going to take this score.