28.27% is the change from 428 to 549
Calculation steps:
[( 549 - 428 ) ÷ 428] x 100 = 28.27%
Formula
Percentage change = [(549 - 428) / 428] x 100
Subtract the new number by the original number
549 - 428 = 121
121 ÷ 428 = 0.2827102803738318
0.2827102803738318 x 100 = 28.27%