-89.08% is the change from 815 to 89
Calculation steps:
[( 89 - 815 ) ÷ 815] x 100 = -89.08%
Formula
Percentage change = [(89 - 815) / 815] x 100
Subtract the new number by the original number
89 - 815 = -726
-726 ÷ 815 = -0.8907975460122699
-0.8907975460122699 x 100 = -89.08%