60.51% is the change from 509 to 817
Calculation steps:
[( 817 - 509 ) ÷ 509] x 100 = 60.51%
Formula
Percentage change = [(817 - 509) / 509] x 100
Subtract the new number by the original number
817 - 509 = 308
308 ÷ 509 = 0.6051080550098232
0.6051080550098232 x 100 = 60.51%