-3.91% is the change from 845 to 812
Calculation steps:
[( 812 - 845 ) ÷ 845] x 100 = -3.91%
Formula
Percentage change = [(812 - 845) / 845] x 100
Subtract the new number by the original number
812 - 845 = -33
-33 ÷ 845 = -0.03905325443786982
-0.03905325443786982 x 100 = -3.91%