67.45% is the change from 255 to 427
Calculation steps:
[( 427 - 255 ) ÷ 255] x 100 = 67.45%
Formula
Percentage change = [(427 - 255) / 255] x 100
Subtract the new number by the original number
427 - 255 = 172
172 ÷ 255 = 0.6745098039215687
0.6745098039215687 x 100 = 67.45%