-79.95% is the change from 858 to 172
Calculation steps:
[( 172 - 858 ) ÷ 858] x 100 = -79.95%
Formula
Percentage change = [(172 - 858) / 858] x 100
Subtract the new number by the original number
172 - 858 = -686
-686 ÷ 858 = -0.7995337995337995
-0.7995337995337995 x 100 = -79.95%