-98.02% is the change from 858 to 17
Calculation steps:
[( 17 - 858 ) ÷ 858] x 100 = -98.02%
Formula
Percentage change = [(17 - 858) / 858] x 100
Subtract the new number by the original number
17 - 858 = -841
-841 ÷ 858 = -0.9801864801864801
-0.9801864801864801 x 100 = -98.02%