-99.26% is the change from 815 to 6
Calculation steps:
[( 6 - 815 ) ÷ 815] x 100 = -99.26%
Formula
Percentage change = [(6 - 815) / 815] x 100
Subtract the new number by the original number
6 - 815 = -809
-809 ÷ 815 = -0.992638036809816
-0.992638036809816 x 100 = -99.26%