33.01% is the change from 521 to 693
Calculation steps:
[( 693 - 521 ) ÷ 521] x 100 = 33.01%
Formula
Percentage change = [(693 - 521) / 521] x 100
Subtract the new number by the original number
693 - 521 = 172
172 ÷ 521 = 0.33013435700575816
0.33013435700575816 x 100 = 33.01%