7.84% is the change from 255 to 275
Calculation steps:
[( 275 - 255 ) ÷ 255] x 100 = 7.84%
Formula
Percentage change = [(275 - 255) / 255] x 100
Subtract the new number by the original number
275 - 255 = 20
20 ÷ 255 = 0.0784313725490196
0.0784313725490196 x 100 = 7.84%