21.14% is the change from 511 to 619
Calculation steps:
[( 619 - 511 ) ÷ 511] x 100 = 21.14%
Formula
Percentage change = [(619 - 511) / 511] x 100
Subtract the new number by the original number
619 - 511 = 108
108 ÷ 511 = 0.21135029354207435
0.21135029354207435 x 100 = 21.14%