-89.55% is the change from 823 to 86
Calculation steps:
[( 86 - 823 ) ÷ 823] x 100 = -89.55%
Formula
Percentage change = [(86 - 823) / 823] x 100
Subtract the new number by the original number
86 - 823 = -737
-737 ÷ 823 = -0.8955042527339003
-0.8955042527339003 x 100 = -89.55%