30.96% is the change from 520 to 681
Calculation steps:
[( 681 - 520 ) ÷ 520] x 100 = 30.96%
Formula
Percentage change = [(681 - 520) / 520] x 100
Subtract the new number by the original number
681 - 520 = 161
161 ÷ 520 = 0.3096153846153846
0.3096153846153846 x 100 = 30.96%