Philadelphia Eagles : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1999 -> 2000     0.375   (0.313 -> 0.688)
Decline:     2004 -> 2005    -0.438   (0.813 -> 0.375)
Last Year:   2024 -> 2025    -0.177   (0.824 -> 0.647)