16.51% is the change from 521 to 607
Calculation steps:
[( 607 - 521 ) ÷ 521] x 100 = 16.51%
Formula
Percentage change = [(607 - 521) / 521] x 100
Subtract the new number by the original number
607 - 521 = 86
86 ÷ 521 = 0.16506717850287908
0.16506717850287908 x 100 = 16.51%