-81.32% is the change from 819 to 153
Calculation steps:
[( 153 - 819 ) ÷ 819] x 100 = -81.32%
Formula
Percentage change = [(153 - 819) / 819] x 100
Subtract the new number by the original number
153 - 819 = -666
-666 ÷ 819 = -0.8131868131868132
-0.8131868131868132 x 100 = -81.32%