-85.47% is the change from 585 to 85
Calculation steps:
[( 85 - 585 ) ÷ 585] x 100 = -85.47%
Formula
Percentage change = [(85 - 585) / 585] x 100
Subtract the new number by the original number
85 - 585 = -500
-500 ÷ 585 = -0.8547008547008547
-0.8547008547008547 x 100 = -85.47%