39.54% is the change from 521 to 727
Calculation steps:
[( 727 - 521 ) ÷ 521] x 100 = 39.54%
Formula
Percentage change = [(727 - 521) / 521] x 100
Subtract the new number by the original number
727 - 521 = 206
206 ÷ 521 = 0.39539347408829173
0.39539347408829173 x 100 = 39.54%