-36.23% is the change from 668 to 426
Calculation steps:
[( 426 - 668 ) ÷ 668] x 100 = -36.23%
Formula
Percentage change = [(426 - 668) / 668] x 100
Subtract the new number by the original number
426 - 668 = -242
-242 ÷ 668 = -0.36227544910179643
-0.36227544910179643 x 100 = -36.23%