-40.33% is the change from 858 to 512
Calculation steps:
[( 512 - 858 ) ÷ 858] x 100 = -40.33%
Formula
Percentage change = [(512 - 858) / 858] x 100
Subtract the new number by the original number
512 - 858 = -346
-346 ÷ 858 = -0.40326340326340326
-0.40326340326340326 x 100 = -40.33%