12.31% is the change from 390 to 438
Calculation steps:
[( 438 - 390 ) ÷ 390] x 100 = 12.31%
Formula
Percentage change = [(438 - 390) / 390] x 100
Subtract the new number by the original number
438 - 390 = 48
48 ÷ 390 = 0.12307692307692308
0.12307692307692308 x 100 = 12.31%