-89.85% is the change from 847 to 86
Calculation steps:
[( 86 - 847 ) ÷ 847] x 100 = -89.85%
Formula
Percentage change = [(86 - 847) / 847] x 100
Subtract the new number by the original number
86 - 847 = -761
-761 ÷ 847 = -0.898465171192444
-0.898465171192444 x 100 = -89.85%