31.78% is the change from 538 to 709
Calculation steps:
[( 709 - 538 ) ÷ 538] x 100 = 31.78%
Formula
Percentage change = [(709 - 538) / 538] x 100
Subtract the new number by the original number
709 - 538 = 171
171 ÷ 538 = 0.31784386617100374
0.31784386617100374 x 100 = 31.78%