11.33% is the change from 256 to 285
Calculation steps:
[( 285 - 256 ) ÷ 256] x 100 = 11.33%
Formula
Percentage change = [(285 - 256) / 256] x 100
Subtract the new number by the original number
285 - 256 = 29
29 ÷ 256 = 0.11328125
0.11328125 x 100 = 11.33%