-79.35% is the change from 804 to 166
Calculation steps:
[( 166 - 804 ) ÷ 804] x 100 = -79.35%
Formula
Percentage change = [(166 - 804) / 804] x 100
Subtract the new number by the original number
166 - 804 = -638
-638 ÷ 804 = -0.7935323383084577
-0.7935323383084577 x 100 = -79.35%