-49.4% is the change from 838 to 424
Calculation steps:
[( 424 - 838 ) ÷ 838] x 100 = -49.4%
Formula
Percentage change = [(424 - 838) / 838] x 100
Subtract the new number by the original number
424 - 838 = -414
-414 ÷ 838 = -0.49403341288782815
-0.49403341288782815 x 100 = -49.4%