-16.48% is the change from 819 to 684
Calculation steps:
[( 684 - 819 ) ÷ 819] x 100 = -16.48%
Formula
Percentage change = [(684 - 819) / 819] x 100
Subtract the new number by the original number
684 - 819 = -135
-135 ÷ 819 = -0.16483516483516483
-0.16483516483516483 x 100 = -16.48%