Need a formula

Hi Advisors,

Users rate my topic as No or Yes. I have three types of data: the total number of users visited the topic, the number of yes rating, the no of No rating. I wanted to have a formula that helps me identity which topic is really bad and need to be reworked. The real problem is for some topics the number of visitors may be high but the number of ratings will be less. For example, the total number of visits can be 12000, but the Yes rating would be 100, and No rating would be 700. In other case, the topic may have just 400 visits, and the Yes rating will be 150 and No rating 250. Many users visit the topic but never rate them. So, I wanted a formula that takes all this into consideration and helps me prioritize the content that really needs to be reworked.

Regards,
Vijaey