9.41% is the change from 255 to 279
Calculation steps:
[( 279 - 255 ) ÷ 255] x 100 = 9.41%
Formula
Percentage change = [(279 - 255) / 255] x 100
Subtract the new number by the original number
279 - 255 = 24
24 ÷ 255 = 0.09411764705882353
0.09411764705882353 x 100 = 9.41%