-98.95% is the change from 859 to 9
Calculation steps:
[( 9 - 859 ) ÷ 859] x 100 = -98.95%
Formula
Percentage change = [(9 - 859) / 859] x 100
Subtract the new number by the original number
9 - 859 = -850
-850 ÷ 859 = -0.989522700814901
-0.989522700814901 x 100 = -98.95%