-40.74% is the change from 432 to 256
Calculation steps:
[( 256 - 432 ) ÷ 432] x 100 = -40.74%
Formula
Percentage change = [(256 - 432) / 432] x 100
Subtract the new number by the original number
256 - 432 = -176
-176 ÷ 432 = -0.4074074074074074
-0.4074074074074074 x 100 = -40.74%