-78.51% is the change from 819 to 176
Calculation steps:
[( 176 - 819 ) ÷ 819] x 100 = -78.51%
Formula
Percentage change = [(176 - 819) / 819] x 100
Subtract the new number by the original number
176 - 819 = -643
-643 ÷ 819 = -0.7851037851037851
-0.7851037851037851 x 100 = -78.51%