33.51% is the change from 388 to 518
Calculation steps:
[( 518 - 388 ) ÷ 388] x 100 = 33.51%
Formula
Percentage change = [(518 - 388) / 388] x 100
Subtract the new number by the original number
518 - 388 = 130
130 ÷ 388 = 0.33505154639175255
0.33505154639175255 x 100 = 33.51%