39.92% is the change from 521 to 729
Calculation steps:
[( 729 - 521 ) ÷ 521] x 100 = 39.92%
Formula
Percentage change = [(729 - 521) / 521] x 100
Subtract the new number by the original number
729 - 521 = 208
208 ÷ 521 = 0.39923224568138194
0.39923224568138194 x 100 = 39.92%