Los Angeles Angels : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2001 -> 2002      14.8   (46.3  ->  61.1)
Decline:     1982 -> 1983     -14.2   (57.4  ->  43.2)
Last Year:   2019 -> 2020      -1.1   (44.4  ->  43.3)