11.73% is the change from 520 to 581
Calculation steps:
[( 581 - 520 ) ÷ 520] x 100 = 11.73%
Formula
Percentage change = [(581 - 520) / 520] x 100
Subtract the new number by the original number
581 - 520 = 61
61 ÷ 520 = 0.11730769230769231
0.11730769230769231 x 100 = 11.73%