19.39% is the change from 521 to 622
Calculation steps:
[( 622 - 521 ) ÷ 521] x 100 = 19.39%
Formula
Percentage change = [(622 - 521) / 521] x 100
Subtract the new number by the original number
622 - 521 = 101
101 ÷ 521 = 0.19385796545105566
0.19385796545105566 x 100 = 19.39%