-39.93% is the change from 819 to 492
Calculation steps:
[( 492 - 819 ) ÷ 819] x 100 = -39.93%
Formula
Percentage change = [(492 - 819) / 819] x 100
Subtract the new number by the original number
492 - 819 = -327
-327 ÷ 819 = -0.3992673992673993
-0.3992673992673993 x 100 = -39.93%