24.9% is the change from 518 to 647
Calculation steps:
[( 647 - 518 ) ÷ 518] x 100 = 24.9%
Formula
Percentage change = [(647 - 518) / 518] x 100
Subtract the new number by the original number
647 - 518 = 129
129 ÷ 518 = 0.24903474903474904
0.24903474903474904 x 100 = 24.9%