-1.83% is the change from 819 to 804
Calculation steps:
[( 804 - 819 ) ÷ 819] x 100 = -1.83%
Formula
Percentage change = [(804 - 819) / 819] x 100
Subtract the new number by the original number
804 - 819 = -15
-15 ÷ 819 = -0.018315018315018316
-0.018315018315018316 x 100 = -1.83%