-99.26% is the change from 810 to 6
Calculation steps:
[( 6 - 810 ) ÷ 810] x 100 = -99.26%
Formula
Percentage change = [(6 - 810) / 810] x 100
Subtract the new number by the original number
6 - 810 = -804
-804 ÷ 810 = -0.9925925925925926
-0.9925925925925926 x 100 = -99.26%