30.15% is the change from 398 to 518
Calculation steps:
[( 518 - 398 ) ÷ 398] x 100 = 30.15%
Formula
Percentage change = [(518 - 398) / 398] x 100
Subtract the new number by the original number
518 - 398 = 120
120 ÷ 398 = 0.3015075376884422
0.3015075376884422 x 100 = 30.15%