40% were wrong.
45.4545.. % wrong.
11
7 wrong out of 22 questions = 31.8% wrong. 15 correct out of 22 questions = 68.2% correct. I hope it wasn't a math test.
69 questions
Nine.
39
7.69%
20
what is your grade percentage if you miss 6 questions out of 40
22 questions can be wrong. This means that you would have to get 33 marks, which is 60%
If you miss 28 questions out of 70, your score would be 60%