-40.67% is the change from 863 to 512
Calculation steps:
[( 512 - 863 ) ÷ 863] x 100 = -40.67%
Formula
Percentage change = [(512 - 863) / 863] x 100
Subtract the new number by the original number
512 - 863 = -351
-351 ÷ 863 = -0.406720741599073
-0.406720741599073 x 100 = -40.67%