-16.14% is the change from 818 to 686
Calculation steps:
[( 686 - 818 ) ÷ 818] x 100 = -16.14%
Formula
Percentage change = [(686 - 818) / 818] x 100
Subtract the new number by the original number
686 - 818 = -132
-132 ÷ 818 = -0.16136919315403422
-0.16136919315403422 x 100 = -16.14%