11.52% is the change from 521 to 581
Calculation steps:
[( 581 - 521 ) ÷ 521] x 100 = 11.52%
Formula
Percentage change = [(581 - 521) / 521] x 100
Subtract the new number by the original number
581 - 521 = 60
60 ÷ 521 = 0.11516314779270634
0.11516314779270634 x 100 = 11.52%