-40.19% is the change from 642 to 384
Calculation steps:
[( 384 - 642 ) ÷ 642] x 100 = -40.19%
Formula
Percentage change = [(384 - 642) / 642] x 100
Subtract the new number by the original number
384 - 642 = -258
-258 ÷ 642 = -0.40186915887850466
-0.40186915887850466 x 100 = -40.19%