-17.79% is the change from 804 to 661
Calculation steps:
[( 661 - 804 ) ÷ 804] x 100 = -17.79%
Formula
Percentage change = [(661 - 804) / 804] x 100
Subtract the new number by the original number
661 - 804 = -143
-143 ÷ 804 = -0.17786069651741293
-0.17786069651741293 x 100 = -17.79%