So if for every level there is a 2 percent increase on top of the last level. What would the formula be?
Level 1: Health = 100
Level 2: Health = 102
Level 3: Health = 104.04
and so on.
I want to just be able to input the level and get a readout on the stat.
This is classic exponential growth. You have a starting value of 100 at t=0, since you want that to be at 1 we use $t-1$ instead as the exponent for the increase of $.02$ to get to
$$Health(level)=100\cdot (1.02)^{level-1}$$