1.57% is the change from 509 to 517
Calculation steps:
[( 517 - 509 ) ÷ 509] x 100 = 1.57%
Formula
Percentage change = [(517 - 509) / 509] x 100
Subtract the new number by the original number
517 - 509 = 8
8 ÷ 509 = 0.015717092337917484
0.015717092337917484 x 100 = 1.57%