Ronaldo you dont need 90 percent for a superior, its going to be borderline impossible to achieve 90 percent ngl. You just need to score higher than all of the people sitting the exam. BTW the scores you get in tutor will not indicate the score you will get in the actual exam eg: you might get superiors in your practice exams but you might get average for the actual test or you might get below averages in your practice tests but score superior in the actual thing