-0.86% is the change from 817 to 810
Calculation steps:
[( 810 - 817 ) ÷ 817] x 100 = -0.86%
Formula
Percentage change = [(810 - 817) / 817] x 100
Subtract the new number by the original number
810 - 817 = -7
-7 ÷ 817 = -0.008567931456548347
-0.008567931456548347 x 100 = -0.86%