It would be nice to group the percentile and flat values in the tool tip and show more subtotals and align them by the decimal point.
Something like this:
Gross Income +21.22
---Wealth Input + 9.26
---Capital City +10.00
--- Bonuses 10.20%
------Deep Space Starbase 5.00%
------ Tourism 5.20%
Later in the game when you have a large number of effects, it would help a lot and not have a calculator next to my desk. For instance this next image is very late in the game. There is no rime or reason how everything is grouped up.