Converting to math

Hello,

I'm doing a game where the player have skills called attack and dodge and I would like that for every 2 attack : 1 dodge, the chance to hit the enemy is somewhere around 70-75%.

Any ideas on how to convert this to a formula?!


Thank you very much.

 

Hit chance = Attack / Dodge / 2 * 75%

This may not have the exact characteristics you are after. But it increases with attack, decreases with dodge, and give a chance of 75% when attack is double dodge.