-37.5% is the change from 408 to 255
Calculation steps:
[( 255 - 408 ) ÷ 408] x 100 = -37.5%
Formula
Percentage change = [(255 - 408) / 408] x 100
Subtract the new number by the original number
255 - 408 = -153
-153 ÷ 408 = -0.375
-0.375 x 100 = -37.5%