12.89% is the change from 256 to 289
Calculation steps:
[( 289 - 256 ) ÷ 256] x 100 = 12.89%
Formula
Percentage change = [(289 - 256) / 256] x 100
Subtract the new number by the original number
289 - 256 = 33
33 ÷ 256 = 0.12890625
0.12890625 x 100 = 12.89%