38.51% is the change from 509 to 705
Calculation steps:
[( 705 - 509 ) ÷ 509] x 100 = 38.51%
Formula
Percentage change = [(705 - 509) / 509] x 100
Subtract the new number by the original number
705 - 509 = 196
196 ÷ 509 = 0.3850687622789784
0.3850687622789784 x 100 = 38.51%