43.23% is the change from 421 to 603
Calculation steps:
[( 603 - 421 ) ÷ 421] x 100 = 43.23%
Formula
Percentage change = [(603 - 421) / 421] x 100
Subtract the new number by the original number
603 - 421 = 182
182 ÷ 421 = 0.4323040380047506
0.4323040380047506 x 100 = 43.23%