18.92% is the change from 259 to 308
Calculation steps:
[( 308 - 259 ) ÷ 259] x 100 = 18.92%
Formula
Percentage change = [(308 - 259) / 259] x 100
Subtract the new number by the original number
308 - 259 = 49
49 ÷ 259 = 0.1891891891891892
0.1891891891891892 x 100 = 18.92%