13.23% is the change from 257 to 291
Calculation steps:
[( 291 - 257 ) ÷ 257] x 100 = 13.23%
Formula
Percentage change = [(291 - 257) / 257] x 100
Subtract the new number by the original number
291 - 257 = 34
34 ÷ 257 = 0.13229571984435798
0.13229571984435798 x 100 = 13.23%