13.65% is the change from 520 to 591
Calculation steps:
[( 591 - 520 ) ÷ 520] x 100 = 13.65%
Formula
Percentage change = [(591 - 520) / 520] x 100
Subtract the new number by the original number
591 - 520 = 71
71 ÷ 520 = 0.13653846153846153
0.13653846153846153 x 100 = 13.65%