8.25% is the change from 521 to 564
Calculation steps:
[( 564 - 521 ) ÷ 521] x 100 = 8.25%
Formula
Percentage change = [(564 - 521) / 521] x 100
Subtract the new number by the original number
564 - 521 = 43
43 ÷ 521 = 0.08253358925143954
0.08253358925143954 x 100 = 8.25%