-8.74% is the change from 641 to 585
Calculation steps:
[( 585 - 641 ) ÷ 641] x 100 = -8.74%
Formula
Percentage change = [(585 - 641) / 641] x 100
Subtract the new number by the original number
585 - 641 = -56
-56 ÷ 641 = -0.0873634945397816
-0.0873634945397816 x 100 = -8.74%