-17.05% is the change from 827 to 686
Calculation steps:
[( 686 - 827 ) ÷ 827] x 100 = -17.05%
Formula
Percentage change = [(686 - 827) / 827] x 100
Subtract the new number by the original number
686 - 827 = -141
-141 ÷ 827 = -0.17049576783555018
-0.17049576783555018 x 100 = -17.05%