-0.86% is the change from 818 to 811
Calculation steps:
[( 811 - 818 ) ÷ 818] x 100 = -0.86%
Formula
Percentage change = [(811 - 818) / 818] x 100
Subtract the new number by the original number
811 - 818 = -7
-7 ÷ 818 = -0.008557457212713936
-0.008557457212713936 x 100 = -0.86%