-0.37% is the change from 819 to 816
Calculation steps:
[( 816 - 819 ) ÷ 819] x 100 = -0.37%
Formula
Percentage change = [(816 - 819) / 819] x 100
Subtract the new number by the original number
816 - 819 = -3
-3 ÷ 819 = -0.003663003663003663
-0.003663003663003663 x 100 = -0.37%