Memphis Grizzlies biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2003 -> 2004     0.269   (0.341 -> 0.610)
Decline:     2006 -> 2007    -0.330   (0.598 -> 0.268)
Last Year:   2025 -> 2026    -0.280   (0.585 -> 0.305)