-98.83% is the change from 856 to 10
Calculation steps:
[( 10 - 856 ) ÷ 856] x 100 = -98.83%
Formula
Percentage change = [(10 - 856) / 856] x 100
Subtract the new number by the original number
10 - 856 = -846
-846 ÷ 856 = -0.9883177570093458
-0.9883177570093458 x 100 = -98.83%