Here's the table.
Based on the latest predictions, The 100 is likely to be renewed. Why, you ask?
The CW has never canceled a fourth season show with less than 70 episodes. It has been getting similar ratings to recently renewed Riverdale in the past few weeks. The CW is also way down from last season and currently the CW median is a 0.4. With the season that the network has had, I don't think its likely that the CW would cancel a show at that level. I think it will likely be back. Relax, peeps!