-3.68% is the change from 843 to 812
Calculation steps:
[( 812 - 843 ) ÷ 843] x 100 = -3.68%
Formula
Percentage change = [(812 - 843) / 843] x 100
Subtract the new number by the original number
812 - 843 = -31
-31 ÷ 843 = -0.036773428232502965
-0.036773428232502965 x 100 = -3.68%