-39.31% is the change from 641 to 389
Calculation steps:
[( 389 - 641 ) ÷ 641] x 100 = -39.31%
Formula
Percentage change = [(389 - 641) / 641] x 100
Subtract the new number by the original number
389 - 641 = -252
-252 ÷ 641 = -0.39313572542901715
-0.39313572542901715 x 100 = -39.31%