34.77% is the change from 509 to 686
Calculation steps:
[( 686 - 509 ) ÷ 509] x 100 = 34.77%
Formula
Percentage change = [(686 - 509) / 509] x 100
Subtract the new number by the original number
686 - 509 = 177
177 ÷ 509 = 0.3477406679764244
0.3477406679764244 x 100 = 34.77%