24.71% is the change from 518 to 646
Calculation steps:
[( 646 - 518 ) ÷ 518] x 100 = 24.71%
Formula
Percentage change = [(646 - 518) / 518] x 100
Subtract the new number by the original number
646 - 518 = 128
128 ÷ 518 = 0.2471042471042471
0.2471042471042471 x 100 = 24.71%