9.68% is the change from 475 to 521
Calculation steps:
[( 521 - 475 ) ÷ 475] x 100 = 9.68%
Formula
Percentage change = [(521 - 475) / 475] x 100
Subtract the new number by the original number
521 - 475 = 46
46 ÷ 475 = 0.0968421052631579
0.0968421052631579 x 100 = 9.68%