-36.79% is the change from 405 to 256
Calculation steps:
[( 256 - 405 ) ÷ 405] x 100 = -36.79%
Formula
Percentage change = [(256 - 405) / 405] x 100
Subtract the new number by the original number
256 - 405 = -149
-149 ÷ 405 = -0.36790123456790125
-0.36790123456790125 x 100 = -36.79%