3.34% is the change from 509 to 526
Calculation steps:
[( 526 - 509 ) ÷ 509] x 100 = 3.34%
Formula
Percentage change = [(526 - 509) / 509] x 100
Subtract the new number by the original number
526 - 509 = 17
17 ÷ 509 = 0.03339882121807466
0.03339882121807466 x 100 = 3.34%