31.47% is the change from 394 to 518
Calculation steps:
[( 518 - 394 ) ÷ 394] x 100 = 31.47%
Formula
Percentage change = [(518 - 394) / 394] x 100
Subtract the new number by the original number
518 - 394 = 124
124 ÷ 394 = 0.3147208121827411
0.3147208121827411 x 100 = 31.47%