-50.56% is the change from 805 to 398
Calculation steps:
[( 398 - 805 ) ÷ 805] x 100 = -50.56%
Formula
Percentage change = [(398 - 805) / 805] x 100
Subtract the new number by the original number
398 - 805 = -407
-407 ÷ 805 = -0.5055900621118012
-0.5055900621118012 x 100 = -50.56%