The 2017 NFL season is 11 weeks old and each team has already been through its bye week, so league math is pretty simple at this particular point in time. Every team has played exactly 10 games, so all of the winning percentages end in two zeroes and it's very easy to see where you stand in the playoff race.
The Philadelphia Eagles, for instance, are at the top of the NFC heap at 9-1, or .900, and they have a four-game lead on the fading and .500 Dallas Cowboys. The Minnesota Vikings (8-2), New Orleans Saints (8-2) and Los Angeles Rams (7-3) are all in first place in their divisions, though the Saints have the 7-3 Carolina Panthers nipping at their heels.