# Reporting Cox & Snell and Nagelkerke in logistical regression [duplicate]

As part of an assignment, I've been asked to report Cox & Snell and Nagelkerke values for my (logistical) regression analyses. I have been asked to interpret them as well as discuss what they suggest for the data. I am a bit confused to what they show, and how I should report them. Also, how do I know if they're important? I am really stuck on how to answer this question.

Many Thanks