22% is the change from 509 to 621
Calculation steps:
[( 621 - 509 ) ÷ 509] x 100 = 22%
Formula
Percentage change = [(621 - 509) / 509] x 100
Subtract the new number by the original number
621 - 509 = 112
112 ÷ 509 = 0.2200392927308448
0.2200392927308448 x 100 = 22%