-17.91% is the change from 804 to 660
Calculation steps:
[( 660 - 804 ) ÷ 804] x 100 = -17.91%
Formula
Percentage change = [(660 - 804) / 804] x 100
Subtract the new number by the original number
660 - 804 = -144
-144 ÷ 804 = -0.1791044776119403
-0.1791044776119403 x 100 = -17.91%