-42.75% is the change from 255 to 146
Calculation steps:
[( 146 - 255 ) ÷ 255] x 100 = -42.75%
Formula
Percentage change = [(146 - 255) / 255] x 100
Subtract the new number by the original number
146 - 255 = -109
-109 ÷ 255 = -0.42745098039215684
-0.42745098039215684 x 100 = -42.75%