-16.95% is the change from 826 to 686
Calculation steps:
[( 686 - 826 ) ÷ 826] x 100 = -16.95%
Formula
Percentage change = [(686 - 826) / 826] x 100
Subtract the new number by the original number
686 - 826 = -140
-140 ÷ 826 = -0.1694915254237288
-0.1694915254237288 x 100 = -16.95%