-0.12% is the change from 812 to 811
Calculation steps:
[( 811 - 812 ) ÷ 812] x 100 = -0.12%
Formula
Percentage change = [(811 - 812) / 812] x 100
Subtract the new number by the original number
811 - 812 = -1
-1 ÷ 812 = -0.0012315270935960591
-0.0012315270935960591 x 100 = -0.12%