Interestingly enough, I just tried out this formula for my past month of stats...subbing in my total views and total reads where you'd inputted each of yours...and, I literally came up with the exact same figure as you did (50.4). So, slightly above 50% as my average?
Which is **far above** what I would have expected to see for my stats, since I've only been on the platform for nine months -- and I have FAR fewer overall followers than you do.