-48.84% is the change from 819 to 419
Calculation steps:
[( 419 - 819 ) ÷ 819] x 100 = -48.84%
Formula
Percentage change = [(419 - 819) / 819] x 100
Subtract the new number by the original number
419 - 819 = -400
-400 ÷ 819 = -0.4884004884004884
-0.4884004884004884 x 100 = -48.84%