For example, if you first answered two questions, and one of them got MHO, then you have 50% MHO. Then you answer another question, and now you only have 33% MHO. So it just goes down the more questions you answer, because, well, math. Unless people just really agree with you.
apparently no one likes your answers enough to give you any ba's recently and when that happens your % will go down. it's simple math and nothing else, no conspiracies against you or whatever, simple math man.