-36.63% is the change from 819 to 519
Calculation steps:
[( 519 - 819 ) ÷ 819] x 100 = -36.63%
Formula
Percentage change = [(519 - 819) / 819] x 100
Subtract the new number by the original number
519 - 819 = -300
-300 ÷ 819 = -0.3663003663003663
-0.3663003663003663 x 100 = -36.63%