102.35% is the change from 255 to 516
Calculation steps:
[( 516 - 255 ) ÷ 255] x 100 = 102.35%
Formula
Percentage change = [(516 - 255) / 255] x 100
Subtract the new number by the original number
516 - 255 = 261
261 ÷ 255 = 1.0235294117647058
1.0235294117647058 x 100 = 102.35%