101.17% is the change from 256 to 515
Calculation steps:
[( 515 - 256 ) ÷ 256] x 100 = 101.17%
Formula
Percentage change = [(515 - 256) / 256] x 100
Subtract the new number by the original number
515 - 256 = 259
259 ÷ 256 = 1.01171875
1.01171875 x 100 = 101.17%