11.28% is the change from 257 to 286
Calculation steps:
[( 286 - 257 ) ÷ 257] x 100 = 11.28%
Formula
Percentage change = [(286 - 257) / 257] x 100
Subtract the new number by the original number
286 - 257 = 29
29 ÷ 257 = 0.11284046692607004
0.11284046692607004 x 100 = 11.28%