User blog comment:Sirebel/Mathematician Required - Apply Within/@comment-31816555-20170423181140

I'm afraid this can't be solved in a quantitative way with just one set of data. You can't even make a statement about whether an upgrade gives more or less than the value shown, since it is possible that one upgrade gave 0.28 and the next 0.32. However, if you take a set of different upgrade paths and mark each change in the delta values, it could be possible to find out a correlation between them. Which would be a very tedious thing to do...

The exact calculation gets even harder since we dont know the exact starting PR and the monkeys probably don't round decimals in the normal way (like for the event hours countdown)