28.03% is the change from 421 to 539
Calculation steps:
[( 539 - 421 ) ÷ 421] x 100 = 28.03%
Formula
Percentage change = [(539 - 421) / 421] x 100
Subtract the new number by the original number
539 - 421 = 118
118 ÷ 421 = 0.28028503562945367
0.28028503562945367 x 100 = 28.03%