Hi ,

Firstly i must appreciate that it is very good that you got so many answers correct but you need not answer every question for which you are not sure of as it will bring you only negative marks.

Now you can not calculate percentile since it is based on the number of people who have given the test, in case you do not know it and if we talk about the marks the marking scheme for All questions is +3 for a right answer and -1 for a wrong MCQ type question where as no negative marking for type in the answer type, so you will need to check your score accordingly.