17.08% is the change from 521 to 610
Calculation steps:
[( 610 - 521 ) ÷ 521] x 100 = 17.08%
Formula
Percentage change = [(610 - 521) / 521] x 100
Subtract the new number by the original number
610 - 521 = 89
89 ÷ 521 = 0.1708253358925144
0.1708253358925144 x 100 = 17.08%