Miami Heat biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2008 -> 2009     0.341   (0.183 -> 0.524)
Decline:     2007 -> 2008    -0.354   (0.537 -> 0.183)
Last Year:   2025 -> 2026     0.073   (0.451 -> 0.524)