Hi Bola,
As confirmed by Mr Fichtner, Real Exam does not disclose the percentage. It only reports the proficiency levels for each knowledge Area/Domain.
Overall I found the real exam to be not so difficult. You should not have any real problems if you are reasonably well prepared. All the 9 exams (PM Exam Simulator) helped me. Simulator UI is very similar to real exam, However real exam questions are little more tricky to solve compare to simulator.
I studied PMBOK at least 3 times inside out, along with few other prep materials. and lot of practice exams. I had been doing at least one practice exam (200 questions) everyday in last 2 weeks before my exam.
Good luck for your exam.
Cheers!
Vivek