50.97% is the change from 259 to 391
Calculation steps:
[( 391 - 259 ) ÷ 259] x 100 = 50.97%
Formula
Percentage change = [(391 - 259) / 259] x 100
Subtract the new number by the original number
391 - 259 = 132
132 ÷ 259 = 0.5096525096525096
0.5096525096525096 x 100 = 50.97%