How exactly the damage depends from attack/defend ratio?

[Keneth]

It works exactly how I wrote it, this is not from the manual, it's from the actual script of the game's mechanism. Stepsongrapes has already put it in words, I just added the eqation and a few things that are also considered in the calculations. For every point of difference the damage is increased or decreased by 3.33% and maxed out at 300% or 33.3%.