Two fat ladies...88

I simply cant get past this figure no matter what I do. SSC it was 88%, HSC 87% and now my ZDfB(5th level german exam at mas muellers) report card says 88%. I missed the magical 90 by 4 marks. Hmmm... not fair!!! Mebbe I m not good enuf... Mebbe I need to work harder... but how much??? Thats my question