61.69% is the change from 509 to 823
Calculation steps:
[( 823 - 509 ) ÷ 509] x 100 = 61.69%
Formula
Percentage change = [(823 - 509) / 509] x 100
Subtract the new number by the original number
823 - 509 = 314
314 ÷ 509 = 0.6168958742632613
0.6168958742632613 x 100 = 61.69%