-40.29% is the change from 819 to 489
Calculation steps:
[( 489 - 819 ) ÷ 819] x 100 = -40.29%
Formula
Percentage change = [(489 - 819) / 819] x 100
Subtract the new number by the original number
489 - 819 = -330
-330 ÷ 819 = -0.40293040293040294
-0.40293040293040294 x 100 = -40.29%