31.47% is the change from 518 to 681
Calculation steps:
[( 681 - 518 ) ÷ 518] x 100 = 31.47%
Formula
Percentage change = [(681 - 518) / 518] x 100
Subtract the new number by the original number
681 - 518 = 163
163 ÷ 518 = 0.31467181467181465
0.31467181467181465 x 100 = 31.47%