-50.37% is the change from 818 to 406
Calculation steps:
[( 406 - 818 ) ÷ 818] x 100 = -50.37%
Formula
Percentage change = [(406 - 818) / 818] x 100
Subtract the new number by the original number
406 - 818 = -412
-412 ÷ 818 = -0.5036674816625917
-0.5036674816625917 x 100 = -50.37%