-31.18% is the change from 850 to 585
Calculation steps:
[( 585 - 850 ) ÷ 850] x 100 = -31.18%
Formula
Percentage change = [(585 - 850) / 850] x 100
Subtract the new number by the original number
585 - 850 = -265
-265 ÷ 850 = -0.31176470588235294
-0.31176470588235294 x 100 = -31.18%