Thread:I didn't spend money in this game/@comment-30416234-20200211221347/@comment-30416234-20200212044606

I tested it with the given information in-game:

The Leech description claims it has 900 defense points (DP), with a 90% damage resist (DR). With the formula, 100/(1-DR/100) ) - 100, that comes out as 900 DP for 90% DR, proving the description correct.

Now, let's test this on Ao Guang, which has 80% DR with 400 DP per the in-game description. Again, ( 100/(1-DR/100) ) - 100 = 400 DP, once again proving the description and the equation correct.

The other equation works in reverse, getting the DR by inputting the DP.