-36.53% is the change from 668 to 424
Calculation steps:
[( 424 - 668 ) ÷ 668] x 100 = -36.53%
Formula
Percentage change = [(424 - 668) / 668] x 100
Subtract the new number by the original number
424 - 668 = -244
-244 ÷ 668 = -0.3652694610778443
-0.3652694610778443 x 100 = -36.53%