6.29% is the change from 318 to 338
Calculation steps:
[( 338 - 318 ) ÷ 318] x 100 = 6.29%
Formula
Percentage change = [(338 - 318) / 318] x 100
Subtract the new number by the original number
338 - 318 = 20
20 ÷ 318 = 0.06289308176100629
0.06289308176100629 x 100 = 6.29%