-43.86% is the change from 456 to 256
Calculation steps:
[( 256 - 456 ) ÷ 456] x 100 = -43.86%
Formula
Percentage change = [(256 - 456) / 456] x 100
Subtract the new number by the original number
256 - 456 = -200
-200 ÷ 456 = -0.43859649122807015
-0.43859649122807015 x 100 = -43.86%