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:   2018 -> 2019      -5.0   (49.4  ->  44.4)