-48.23% is the change from 819 to 424
Calculation steps:
[( 424 - 819 ) ÷ 819] x 100 = -48.23%
Formula
Percentage change = [(424 - 819) / 819] x 100
Subtract the new number by the original number
424 - 819 = -395
-395 ÷ 819 = -0.4822954822954823
-0.4822954822954823 x 100 = -48.23%