16.89% is the change from 521 to 609
Calculation steps:
[( 609 - 521 ) ÷ 521] x 100 = 16.89%
Formula
Percentage change = [(609 - 521) / 521] x 100
Subtract the new number by the original number
609 - 521 = 88
88 ÷ 521 = 0.1689059500959693
0.1689059500959693 x 100 = 16.89%