-79.26% is the change from 810 to 168
Calculation steps:
[( 168 - 810 ) ÷ 810] x 100 = -79.26%
Formula
Percentage change = [(168 - 810) / 810] x 100
Subtract the new number by the original number
168 - 810 = -642
-642 ÷ 810 = -0.7925925925925926
-0.7925925925925926 x 100 = -79.26%