-19.93% is the change from 858 to 687
Calculation steps:
[( 687 - 858 ) ÷ 858] x 100 = -19.93%
Formula
Percentage change = [(687 - 858) / 858] x 100
Subtract the new number by the original number
687 - 858 = -171
-171 ÷ 858 = -0.1993006993006993
-0.1993006993006993 x 100 = -19.93%