-98.95% is the change from 860 to 9
Calculation steps:
[( 9 - 860 ) ÷ 860] x 100 = -98.95%
Formula
Percentage change = [(9 - 860) / 860] x 100
Subtract the new number by the original number
9 - 860 = -851
-851 ÷ 860 = -0.9895348837209302
-0.9895348837209302 x 100 = -98.95%