-81.05% is the change from 818 to 155
Calculation steps:
[( 155 - 818 ) ÷ 818] x 100 = -81.05%
Formula
Percentage change = [(155 - 818) / 818] x 100
Subtract the new number by the original number
155 - 818 = -663
-663 ÷ 818 = -0.8105134474327629
-0.8105134474327629 x 100 = -81.05%