-79.41% is the change from 816 to 168
Calculation steps:
[( 168 - 816 ) ÷ 816] x 100 = -79.41%
Formula
Percentage change = [(168 - 816) / 816] x 100
Subtract the new number by the original number
168 - 816 = -648
-648 ÷ 816 = -0.7941176470588235
-0.7941176470588235 x 100 = -79.41%