-85.35% is the change from 819 to 120
Calculation steps:
[( 120 - 819 ) ÷ 819] x 100 = -85.35%
Formula
Percentage change = [(120 - 819) / 819] x 100
Subtract the new number by the original number
120 - 819 = -699
-699 ÷ 819 = -0.8534798534798534
-0.8534798534798534 x 100 = -85.35%