-41.55% is the change from 438 to 256
Calculation steps:
[( 256 - 438 ) ÷ 438] x 100 = -41.55%
Formula
Percentage change = [(256 - 438) / 438] x 100
Subtract the new number by the original number
256 - 438 = -182
-182 ÷ 438 = -0.4155251141552511
-0.4155251141552511 x 100 = -41.55%