23.35% is the change from 257 to 317
Calculation steps:
[( 317 - 257 ) ÷ 257] x 100 = 23.35%
Formula
Percentage change = [(317 - 257) / 257] x 100
Subtract the new number by the original number
317 - 257 = 60
60 ÷ 257 = 0.23346303501945526
0.23346303501945526 x 100 = 23.35%