How do we vote for best answers using purple format?

and if the asker (like the last 5 questions ive answered) does not choose a best answer, its at the expense of the own Best answer percentage. This takes the competition out of yahoo ansers wich now serves for those who do find enjoyment in just answering someones questions. Theres nothinbg wrong with that but the comeption was fun. Also, top contributors will find it alot harder to keep their status

Yahoo no longer cares about opinions of the community. The best answer from now on will be the one that the asker had already decided he or she wanted to hear before the question was posted.

You don't...Didn't they stop and think that

the asker doesn't actually know the best or correct answer ...Why would anyone think that the person asking the question would know more than the people answering, that's why they asked the question in the first place.