23.03% is the change from 521 to 641
Calculation steps:
[( 641 - 521 ) ÷ 521] x 100 = 23.03%
Formula
Percentage change = [(641 - 521) / 521] x 100
Subtract the new number by the original number
641 - 521 = 120
120 ÷ 521 = 0.23032629558541268
0.23032629558541268 x 100 = 23.03%