-18.29% is the change from 809 to 661
Calculation steps:
[( 661 - 809 ) ÷ 809] x 100 = -18.29%
Formula
Percentage change = [(661 - 809) / 809] x 100
Subtract the new number by the original number
661 - 809 = -148
-148 ÷ 809 = -0.18294190358467244
-0.18294190358467244 x 100 = -18.29%