26.07% is the change from 257 to 324
Calculation steps:
[( 324 - 257 ) ÷ 257] x 100 = 26.07%
Formula
Percentage change = [(324 - 257) / 257] x 100
Subtract the new number by the original number
324 - 257 = 67
67 ÷ 257 = 0.2607003891050584
0.2607003891050584 x 100 = 26.07%