-43.74% is the change from 455 to 256
Calculation steps:
[( 256 - 455 ) ÷ 455] x 100 = -43.74%
Formula
Percentage change = [(256 - 455) / 455] x 100
Subtract the new number by the original number
256 - 455 = -199
-199 ÷ 455 = -0.43736263736263736
-0.43736263736263736 x 100 = -43.74%