-50.13% is the change from 798 to 398
Calculation steps:
[( 398 - 798 ) ÷ 798] x 100 = -50.13%
Formula
Percentage change = [(398 - 798) / 798] x 100
Subtract the new number by the original number
398 - 798 = -400
-400 ÷ 798 = -0.5012531328320802
-0.5012531328320802 x 100 = -50.13%