15.29% is the change from 255 to 294
Calculation steps:
[( 294 - 255 ) ÷ 255] x 100 = 15.29%
Formula
Percentage change = [(294 - 255) / 255] x 100
Subtract the new number by the original number
294 - 255 = 39
39 ÷ 255 = 0.15294117647058825
0.15294117647058825 x 100 = 15.29%