Question about poker tracker

I have just downloaded poker tracker and have imported all the hands that it will allow me to in the evaluation version. I am going to register it, but before I do, I had some questions that I was hoping someone knew the answers to. When posting hands and reads/stats on a user/player, they often give three sets of numbers (ie. 26/15/4). What are these numbers and are those numbers found by using poker tracker? How can I find my numbers with Poker tracker? Or can I?

Thanks