-79.37% is the change from 819 to 169
Calculation steps:
[( 169 - 819 ) ÷ 819] x 100 = -79.37%
Formula
Percentage change = [(169 - 819) / 819] x 100
Subtract the new number by the original number
169 - 819 = -650
-650 ÷ 819 = -0.7936507936507936
-0.7936507936507936 x 100 = -79.37%