I personally hate the percentage... Its not like I'm "hating" or anything like that but when you know you've given the Most Helpful or Best Answer to someone and they never select an answer at all. I mean when they literally explain to you how much you helped them.
Another reason is when you give a better one or they already selected one.
But those are just details to back up my answers. I'd rather give you how many MH/BA because I answer many questions in attempt to help others with that being said the more I answer despite how many of mines they select the % doesn't really go up much or if it does it goes down as soon as I answer more questions.
But here's mines is 10% and I have 116 Most Helpful answers
12% (5 MH) earlier it was 9%. (3 MH) I don't know how it works though because when I had no MH my percentage was 14%. And at some point my (3 MH) was 12%. Does it work on how many questions you answer, or on likes also?