-37.19% is the change from 406 to 255
Calculation steps:
[( 255 - 406 ) ÷ 406] x 100 = -37.19%
Formula
Percentage change = [(255 - 406) / 406] x 100
Subtract the new number by the original number
255 - 406 = -151
-151 ÷ 406 = -0.37192118226600984
-0.37192118226600984 x 100 = -37.19%