-85.81% is the change from 585 to 83
Calculation steps:
[( 83 - 585 ) ÷ 585] x 100 = -85.81%
Formula
Percentage change = [(83 - 585) / 585] x 100
Subtract the new number by the original number
83 - 585 = -502
-502 ÷ 585 = -0.8581196581196581
-0.8581196581196581 x 100 = -85.81%