33.47% is the change from 239 to 319
Calculation steps:
[( 319 - 239 ) ÷ 239] x 100 = 33.47%
Formula
Percentage change = [(319 - 239) / 239] x 100
Subtract the new number by the original number
319 - 239 = 80
80 ÷ 239 = 0.33472803347280333
0.33472803347280333 x 100 = 33.47%