2.39% is the change from 251 to 257
Calculation steps:
[( 257 - 251 ) ÷ 251] x 100 = 2.39%
Formula
Percentage change = [(257 - 251) / 251] x 100
Subtract the new number by the original number
257 - 251 = 6
6 ÷ 251 = 0.02390438247011952
0.02390438247011952 x 100 = 2.39%