-97.78% is the change from 585 to 13
Calculation steps:
[( 13 - 585 ) ÷ 585] x 100 = -97.78%
Formula
Percentage change = [(13 - 585) / 585] x 100
Subtract the new number by the original number
13 - 585 = -572
-572 ÷ 585 = -0.9777777777777777
-0.9777777777777777 x 100 = -97.78%