2.57% is the change from 428 to 439
Calculation steps:
[( 439 - 428 ) ÷ 428] x 100 = 2.57%
Formula
Percentage change = [(439 - 428) / 428] x 100
Subtract the new number by the original number
439 - 428 = 11
11 ÷ 428 = 0.02570093457943925
0.02570093457943925 x 100 = 2.57%