-79.84% is the change from 858 to 173
Calculation steps:
[( 173 - 858 ) ÷ 858] x 100 = -79.84%
Formula
Percentage change = [(173 - 858) / 858] x 100
Subtract the new number by the original number
173 - 858 = -685
-685 ÷ 858 = -0.7983682983682984
-0.7983682983682984 x 100 = -79.84%