-39.56% is the change from 819 to 495
Calculation steps:
[( 495 - 819 ) ÷ 819] x 100 = -39.56%
Formula
Percentage change = [(495 - 819) / 819] x 100
Subtract the new number by the original number
495 - 819 = -324
-324 ÷ 819 = -0.3956043956043956
-0.3956043956043956 x 100 = -39.56%