It is a very old saying that if you scores a lot in your exam and if your grades are higher than other then you are a very brilliant student. Does that really defines our capabilities or our stream of knowledge and vision, or it is just a myth...
Academic marks will reflect how focusses you are and whether you are able to demonstarte application of that knowldege in a critical and analytical manner . Grammar , spelling , syntax, punctuation , good paragraphing , referencing etc, matters , indicating you are paying attention to guidelines and details.
Hard study provides only good knowledge, if you don't polish this knowledge with scientific experience then your knowledge will die and so will do your hard lifetime study. However, when you add experience to your knowledge you will be creative.
My area is both didactic and clinical so this colors my response. While good grades do not necessarily indicate good clinicians, they do often go together
This all depend on the pattern of examination. If the examination is just testing the remembering power (or in short the short-term memory) then the percent or grade is ok but that will not measure you ability beyond that. In fact as per Bloom" s learning level one has to test Remembering, Understanding , Applying, Evaluating and creating ability and if that is not done then this grading or percentage is not relevant in long run.
The academic percentage and grade does matter as it is a result of a test that you took to know how much you have learned. Sadly, in context of Nepal, the marks we obtain are based on how we have written rather than what we have written. We are often stuck with theoretical knowledge which differs a lot in practical use.