-49.52% is the change from 838 to 423
Calculation steps:
[( 423 - 838 ) ÷ 838] x 100 = -49.52%
Formula
Percentage change = [(423 - 838) / 838] x 100
Subtract the new number by the original number
423 - 838 = -415
-415 ÷ 838 = -0.49522673031026254
-0.49522673031026254 x 100 = -49.52%