Minnesota Vikings : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2011 -> 2012     0.437   (0.188 -> 0.625)
Decline:     2000 -> 2001    -0.375   (0.688 -> 0.313)
Last Year:   2024 -> 2025    -0.295   (0.824 -> 0.529)