-40.42% is the change from 819 to 488
Calculation steps:
[( 488 - 819 ) ÷ 819] x 100 = -40.42%
Formula
Percentage change = [(488 - 819) / 819] x 100
Subtract the new number by the original number
488 - 819 = -331
-331 ÷ 819 = -0.40415140415140416
-0.40415140415140416 x 100 = -40.42%