-38.77% is the change from 668 to 409
Calculation steps:
[( 409 - 668 ) ÷ 668] x 100 = -38.77%
Formula
Percentage change = [(409 - 668) / 668] x 100
Subtract the new number by the original number
409 - 668 = -259
-259 ÷ 668 = -0.38772455089820357
-0.38772455089820357 x 100 = -38.77%