-37.25% is the change from 408 to 256
Calculation steps:
[( 256 - 408 ) ÷ 408] x 100 = -37.25%
Formula
Percentage change = [(256 - 408) / 408] x 100
Subtract the new number by the original number
256 - 408 = -152
-152 ÷ 408 = -0.37254901960784315
-0.37254901960784315 x 100 = -37.25%