102.73% is the change from 256 to 519
Calculation steps:
[( 519 - 256 ) ÷ 256] x 100 = 102.73%
Formula
Percentage change = [(519 - 256) / 256] x 100
Subtract the new number by the original number
519 - 256 = 263
263 ÷ 256 = 1.02734375
1.02734375 x 100 = 102.73%