30.17% is the change from 421 to 548
Calculation steps:
[( 548 - 421 ) ÷ 421] x 100 = 30.17%
Formula
Percentage change = [(548 - 421) / 421] x 100
Subtract the new number by the original number
548 - 421 = 127
127 ÷ 421 = 0.3016627078384798
0.3016627078384798 x 100 = 30.17%