Portland Trail Blazers biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2013 -> 2014     0.257   (0.402 -> 0.659)
Decline:     2021 -> 2022    -0.254   (0.583 -> 0.329)
Last Year:   2025 -> 2026     0.073   (0.439 -> 0.512)