31.27% is the change from 259 to 340
Calculation steps:
[( 340 - 259 ) ÷ 259] x 100 = 31.27%
Formula
Percentage change = [(340 - 259) / 259] x 100
Subtract the new number by the original number
340 - 259 = 81
81 ÷ 259 = 0.3127413127413127
0.3127413127413127 x 100 = 31.27%