-43.24% is the change from 451 to 256
Calculation steps:
[( 256 - 451 ) ÷ 451] x 100 = -43.24%
Formula
Percentage change = [(256 - 451) / 451] x 100
Subtract the new number by the original number
256 - 451 = -195
-195 ÷ 451 = -0.43237250554323725
-0.43237250554323725 x 100 = -43.24%