-77.41% is the change from 819 to 185
Calculation steps:
[( 185 - 819 ) ÷ 819] x 100 = -77.41%
Formula
Percentage change = [(185 - 819) / 819] x 100
Subtract the new number by the original number
185 - 819 = -634
-634 ÷ 819 = -0.7741147741147741
-0.7741147741147741 x 100 = -77.41%