-52.32% is the change from 818 to 390
Calculation steps:
[( 390 - 818 ) ÷ 818] x 100 = -52.32%
Formula
Percentage change = [(390 - 818) / 818] x 100
Subtract the new number by the original number
390 - 818 = -428
-428 ÷ 818 = -0.5232273838630807
-0.5232273838630807 x 100 = -52.32%