-37.1% is the change from 407 to 256
Calculation steps:
[( 256 - 407 ) ÷ 407] x 100 = -37.1%
Formula
Percentage change = [(256 - 407) / 407] x 100
Subtract the new number by the original number
256 - 407 = -151
-151 ÷ 407 = -0.371007371007371
-0.371007371007371 x 100 = -37.1%