-19.2% is the change from 849 to 686
Calculation steps:
[( 686 - 849 ) ÷ 849] x 100 = -19.2%
Formula
Percentage change = [(686 - 849) / 849] x 100
Subtract the new number by the original number
686 - 849 = -163
-163 ÷ 849 = -0.19199057714958775
-0.19199057714958775 x 100 = -19.2%