39.29% is the change from 509 to 709
Calculation steps:
[( 709 - 509 ) ÷ 509] x 100 = 39.29%
Formula
Percentage change = [(709 - 509) / 509] x 100
Subtract the new number by the original number
709 - 509 = 200
200 ÷ 509 = 0.3929273084479371
0.3929273084479371 x 100 = 39.29%