-79% is the change from 800 to 168
Calculation steps:
[( 168 - 800 ) ÷ 800] x 100 = -79%
Formula
Percentage change = [(168 - 800) / 800] x 100
Subtract the new number by the original number
168 - 800 = -632
-632 ÷ 800 = -0.79
-0.79 x 100 = -79%
Example