18.81% is the change from 521 to 619
Calculation steps:
[( 619 - 521 ) ÷ 521] x 100 = 18.81%
Formula
Percentage change = [(619 - 521) / 521] x 100
Subtract the new number by the original number
619 - 521 = 98
98 ÷ 521 = 0.18809980806142035
0.18809980806142035 x 100 = 18.81%