8.63% is the change from 394 to 428
Calculation steps:
[( 428 - 394 ) ÷ 394] x 100 = 8.63%
Formula
Percentage change = [(428 - 394) / 394] x 100
Subtract the new number by the original number
428 - 394 = 34
34 ÷ 394 = 0.08629441624365482
0.08629441624365482 x 100 = 8.63%