509% is the change from 100 to 609
Calculation steps:
[( 609 - 100 ) ÷ 100] x 100 = 509%
Formula
Percentage change = [(609 - 100) / 100] x 100
Subtract the new number by the original number
609 - 100 = 509
509 ÷ 100 = 5.09
5.09 x 100 = 509%
Example