30.9% is the change from 521 to 682
Calculation steps:
[( 682 - 521 ) ÷ 521] x 100 = 30.9%
Formula
Percentage change = [(682 - 521) / 521] x 100
Subtract the new number by the original number
682 - 521 = 161
161 ÷ 521 = 0.30902111324376197
0.30902111324376197 x 100 = 30.9%