-40.95% is the change from 867 to 512
Calculation steps:
[( 512 - 867 ) ÷ 867] x 100 = -40.95%
Formula
Percentage change = [(512 - 867) / 867] x 100
Subtract the new number by the original number
512 - 867 = -355
-355 ÷ 867 = -0.40945790080738176
-0.40945790080738176 x 100 = -40.95%