-51.79% is the change from 838 to 404
Calculation steps:
[( 404 - 838 ) ÷ 838] x 100 = -51.79%
Formula
Percentage change = [(404 - 838) / 838] x 100
Subtract the new number by the original number
404 - 838 = -434
-434 ÷ 838 = -0.5178997613365155
-0.5178997613365155 x 100 = -51.79%