-88.32% is the change from 856 to 100
Calculation steps:
[( 100 - 856 ) ÷ 856] x 100 = -88.32%
Formula
Percentage change = [(100 - 856) / 856] x 100
Subtract the new number by the original number
100 - 856 = -756
-756 ÷ 856 = -0.883177570093458
-0.883177570093458 x 100 = -88.32%