32.82% is the change from 518 to 688
Calculation steps:
[( 688 - 518 ) ÷ 518] x 100 = 32.82%
Formula
Percentage change = [(688 - 518) / 518] x 100
Subtract the new number by the original number
688 - 518 = 170
170 ÷ 518 = 0.3281853281853282
0.3281853281853282 x 100 = 32.82%