-51.67% is the change from 838 to 405
Calculation steps:
[( 405 - 838 ) ÷ 838] x 100 = -51.67%
Formula
Percentage change = [(405 - 838) / 838] x 100
Subtract the new number by the original number
405 - 838 = -433
-433 ÷ 838 = -0.5167064439140812
-0.5167064439140812 x 100 = -51.67%