9.18% is the change from 392 to 428
Calculation steps:
[( 428 - 392 ) ÷ 392] x 100 = 9.18%
Formula
Percentage change = [(428 - 392) / 392] x 100
Subtract the new number by the original number
428 - 392 = 36
36 ÷ 392 = 0.09183673469387756
0.09183673469387756 x 100 = 9.18%