32.82% is the change from 390 to 518
Calculation steps:
[( 518 - 390 ) ÷ 390] x 100 = 32.82%
Formula
Percentage change = [(518 - 390) / 390] x 100
Subtract the new number by the original number
518 - 390 = 128
128 ÷ 390 = 0.3282051282051282
0.3282051282051282 x 100 = 32.82%