-39.44% is the change from 819 to 496
Calculation steps:
[( 496 - 819 ) ÷ 819] x 100 = -39.44%
Formula
Percentage change = [(496 - 819) / 819] x 100
Subtract the new number by the original number
496 - 819 = -323
-323 ÷ 819 = -0.39438339438339437
-0.39438339438339437 x 100 = -39.44%