You divide the number of questions you got right by the number of questions there are then multiply the answer by 100.
Use a calculator
80 percent percent = 0.008. The two tailed z-score for 0.008 is 2.652
His score is 80%
16 is 80% of a score
Don't study.
33%
no..that is a terrible score.
Raise your score by 12%.
D+
88
z = 1.75
84.5%