-34.88% is the change from 668 to 435
Calculation steps:
[( 435 - 668 ) ÷ 668] x 100 = -34.88%
Formula
Percentage change = [(435 - 668) / 668] x 100
Subtract the new number by the original number
435 - 668 = -233
-233 ÷ 668 = -0.34880239520958084
-0.34880239520958084 x 100 = -34.88%