12.72% is the change from 228 to 257
Calculation steps:
[( 257 - 228 ) ÷ 228] x 100 = 12.72%
Formula
Percentage change = [(257 - 228) / 228] x 100
Subtract the new number by the original number
257 - 228 = 29
29 ÷ 228 = 0.12719298245614036
0.12719298245614036 x 100 = 12.72%