-77.29% is the change from 819 to 186
Calculation steps:
[( 186 - 819 ) ÷ 819] x 100 = -77.29%
Formula
Percentage change = [(186 - 819) / 819] x 100
Subtract the new number by the original number
186 - 819 = -633
-633 ÷ 819 = -0.7728937728937729
-0.7728937728937729 x 100 = -77.29%