That's a great achievement to score 88% marks in your exam. Ofcourse, you have a good knowledge about your subject that's why you got such a nice grade.
But Don't you want to learn more about mistake which stopped you getting 100%? Ofcourse Yes.
So, give a look to your exams and find out what issues cause a bit problem to achieve that goal, and then try to improve that. But How?
You just need to search on Google that how you can improve your writing issues. Such that, if you found issues in writing a title, just find a good guide on how to write a good title, and make your piece perfect.