58.94% is the change from 509 to 809
Calculation steps:
[( 809 - 509 ) ÷ 509] x 100 = 58.94%
Formula
Percentage change = [(809 - 509) / 509] x 100
Subtract the new number by the original number
809 - 509 = 300
300 ÷ 509 = 0.5893909626719057
0.5893909626719057 x 100 = 58.94%