-16.32% is the change from 815 to 682
Calculation steps:
[( 682 - 815 ) ÷ 815] x 100 = -16.32%
Formula
Percentage change = [(682 - 815) / 815] x 100
Subtract the new number by the original number
682 - 815 = -133
-133 ÷ 815 = -0.16319018404907976
-0.16319018404907976 x 100 = -16.32%