-5.49% is the change from 255 to 241
Calculation steps:
[( 241 - 255 ) ÷ 255] x 100 = -5.49%
Formula
Percentage change = [(241 - 255) / 255] x 100
Subtract the new number by the original number
241 - 255 = -14
-14 ÷ 255 = -0.054901960784313725
-0.054901960784313725 x 100 = -5.49%