Hi @investorkjj :)

1. Good questions! No, the rating does not effect how much money you will make. Although, it does reflect how much STEEM you've earned throughout your history here.
2. No, it's not all about quantity. The value of each vote is directly proportional to the amount of Steem Power that voter has in their wallet.
3. On the percentage, are you using a web browser plugin for Steemit? If so, that percentage reveals how strong of a vote each user decided to vote with. Once you accumulate a few hundred Steem Power you can vote on posts on a scale of 1% - 100%.