-26.35% is the change from 668 to 492
Calculation steps:
[( 492 - 668 ) ÷ 668] x 100 = -26.35%
Formula
Percentage change = [(492 - 668) / 668] x 100
Subtract the new number by the original number
492 - 668 = -176
-176 ÷ 668 = -0.2634730538922156
-0.2634730538922156 x 100 = -26.35%