21.61% is the change from 509 to 619
Calculation steps:
[( 619 - 509 ) ÷ 509] x 100 = 21.61%
Formula
Percentage change = [(619 - 509) / 509] x 100
Subtract the new number by the original number
619 - 509 = 110
110 ÷ 509 = 0.21611001964636542
0.21611001964636542 x 100 = 21.61%