Detroit Pistons biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1949 -> 1950     0.221   (0.367 -> 0.588)
Decline:     2008 -> 2009    -0.244   (0.720 -> 0.476)
Last Year:   2022 -> 2023    -0.073   (0.280 -> 0.207)