-74.85% is the change from 668 to 168
Calculation steps:
[( 168 - 668 ) ÷ 668] x 100 = -74.85%
Formula
Percentage change = [(168 - 668) / 668] x 100
Subtract the new number by the original number
168 - 668 = -500
-500 ÷ 668 = -0.7485029940119761
-0.7485029940119761 x 100 = -74.85%