15.04% is the change from 339 to 390
Calculation steps:
[( 390 - 339 ) ÷ 339] x 100 = 15.04%
Formula
Percentage change = [(390 - 339) / 339] x 100
Subtract the new number by the original number
390 - 339 = 51
51 ÷ 339 = 0.1504424778761062
0.1504424778761062 x 100 = 15.04%