-1.1% is the change from 818 to 809
Calculation steps:
[( 809 - 818 ) ÷ 818] x 100 = -1.1%
Formula
Percentage change = [(809 - 818) / 818] x 100
Subtract the new number by the original number
809 - 818 = -9
-9 ÷ 818 = -0.011002444987775062
-0.011002444987775062 x 100 = -1.1%