-0.12% is the change from 845 to 844
Calculation steps:
[( 844 - 845 ) ÷ 845] x 100 = -0.12%
Formula
Percentage change = [(844 - 845) / 845] x 100
Subtract the new number by the original number
844 - 845 = -1
-1 ÷ 845 = -0.001183431952662722
-0.001183431952662722 x 100 = -0.12%