15.18% is the change from 257 to 296
Calculation steps:
[( 296 - 257 ) ÷ 257] x 100 = 15.18%
Formula
Percentage change = [(296 - 257) / 257] x 100
Subtract the new number by the original number
296 - 257 = 39
39 ÷ 257 = 0.1517509727626459
0.1517509727626459 x 100 = 15.18%