-40.42% is the change from 428 to 255
Calculation steps:
[( 255 - 428 ) ÷ 428] x 100 = -40.42%
Formula
Percentage change = [(255 - 428) / 428] x 100
Subtract the new number by the original number
255 - 428 = -173
-173 ÷ 428 = -0.40420560747663553
-0.40420560747663553 x 100 = -40.42%