-18.82% is the change from 845 to 686
Calculation steps:
[( 686 - 845 ) ÷ 845] x 100 = -18.82%
Formula
Percentage change = [(686 - 845) / 845] x 100
Subtract the new number by the original number
686 - 845 = -159
-159 ÷ 845 = -0.1881656804733728
-0.1881656804733728 x 100 = -18.82%