-0.12% is the change from 813 to 812
Calculation steps:
[( 812 - 813 ) ÷ 813] x 100 = -0.12%
Formula
Percentage change = [(812 - 813) / 813] x 100
Subtract the new number by the original number
812 - 813 = -1
-1 ÷ 813 = -0.0012300123001230013
-0.0012300123001230013 x 100 = -0.12%