-90.51% is the change from 906 to 86
Calculation steps:
[( 86 - 906 ) ÷ 906] x 100 = -90.51%
Formula
Percentage change = [(86 - 906) / 906] x 100
Subtract the new number by the original number
86 - 906 = -820
-820 ÷ 906 = -0.9050772626931567
-0.9050772626931567 x 100 = -90.51%