38.7% is the change from 509 to 706
Calculation steps:
[( 706 - 509 ) ÷ 509] x 100 = 38.7%
Formula
Percentage change = [(706 - 509) / 509] x 100
Subtract the new number by the original number
706 - 509 = 197
197 ÷ 509 = 0.38703339882121807
0.38703339882121807 x 100 = 38.7%