-13.68% is the change from 585 to 505
Calculation steps:
[( 505 - 585 ) ÷ 585] x 100 = -13.68%
Formula
Percentage change = [(505 - 585) / 585] x 100
Subtract the new number by the original number
505 - 585 = -80
-80 ÷ 585 = -0.13675213675213677
-0.13675213675213677 x 100 = -13.68%