8.63% is the change from 255 to 277
Calculation steps:
[( 277 - 255 ) ÷ 255] x 100 = 8.63%
Formula
Percentage change = [(277 - 255) / 255] x 100
Subtract the new number by the original number
277 - 255 = 22
22 ÷ 255 = 0.08627450980392157
0.08627450980392157 x 100 = 8.63%