103.53% is the change from 255 to 519
Calculation steps:
[( 519 - 255 ) ÷ 255] x 100 = 103.53%
Formula
Percentage change = [(519 - 255) / 255] x 100
Subtract the new number by the original number
519 - 255 = 264
264 ÷ 255 = 1.035294117647059
1.035294117647059 x 100 = 103.53%