-56.48% is the change from 586 to 255
Calculation steps:
[( 255 - 586 ) ÷ 586] x 100 = -56.48%
Formula
Percentage change = [(255 - 586) / 586] x 100
Subtract the new number by the original number
255 - 586 = -331
-331 ÷ 586 = -0.5648464163822525
-0.5648464163822525 x 100 = -56.48%