-70.82% is the change from 819 to 239
Calculation steps:
[( 239 - 819 ) ÷ 819] x 100 = -70.82%
Formula
Percentage change = [(239 - 819) / 819] x 100
Subtract the new number by the original number
239 - 819 = -580
-580 ÷ 819 = -0.7081807081807082
-0.7081807081807082 x 100 = -70.82%