User blog comment:Commander Marko/Do Ranked KDA stats mean that much?/@comment-4652200-20140610135331

It is much easier to use K/D/A coefficient to gauge skill/success than using raw K/D/A.

I like the formula (K+A)/D which is used in this site - http://euw.op.gg/

As many people have already stated K/D/A isn't the most important thing in ranked, although it allows you to make a rough estimation of how good is someone at playing a champ.