Quote Originally Posted by Limsyoker:1584349
It's the total of number of Kills divided by the number of deaths a player has (Kills/deaths).

Example:

18900 Kills
4900 Deaths

18900/4900 = 3.857 ~ 3.9Kill death ratio
18900/4900= 189:49 in Ratio Form, When you divide it , it gives 3.857 but that isn't ratio form