9.49% is the change from 390 to 427
Calculation steps:
[( 427 - 390 ) ÷ 390] x 100 = 9.49%
Formula
Percentage change = [(427 - 390) / 390] x 100
Subtract the new number by the original number
427 - 390 = 37
37 ÷ 390 = 0.09487179487179487
0.09487179487179487 x 100 = 9.49%