-40.81% is the change from 865 to 512
Calculation steps:
[( 512 - 865 ) ÷ 865] x 100 = -40.81%
Formula
Percentage change = [(512 - 865) / 865] x 100
Subtract the new number by the original number
512 - 865 = -353
-353 ÷ 865 = -0.40809248554913297
-0.40809248554913297 x 100 = -40.81%