-89.56% is the change from 824 to 86
Calculation steps:
[( 86 - 824 ) ÷ 824] x 100 = -89.56%
Formula
Percentage change = [(86 - 824) / 824] x 100
Subtract the new number by the original number
86 - 824 = -738
-738 ÷ 824 = -0.8956310679611651
-0.8956310679611651 x 100 = -89.56%