-52.51% is the change from 838 to 398
Calculation steps:
[( 398 - 838 ) ÷ 838] x 100 = -52.51%
Formula
Percentage change = [(398 - 838) / 838] x 100
Subtract the new number by the original number
398 - 838 = -440
-440 ÷ 838 = -0.5250596658711217
-0.5250596658711217 x 100 = -52.51%