8.56% is the change from 257 to 279
Calculation steps:
[( 279 - 257 ) ÷ 257] x 100 = 8.56%
Formula
Percentage change = [(279 - 257) / 257] x 100
Subtract the new number by the original number
279 - 257 = 22
22 ÷ 257 = 0.08560311284046693
0.08560311284046693 x 100 = 8.56%