-19.74% is the change from 856 to 687
Calculation steps:
[( 687 - 856 ) ÷ 856] x 100 = -19.74%
Formula
Percentage change = [(687 - 856) / 856] x 100
Subtract the new number by the original number
687 - 856 = -169
-169 ÷ 856 = -0.19742990654205608
-0.19742990654205608 x 100 = -19.74%