38.1% is the change from 420 to 580
Calculation steps:
[( 580 - 420 ) ÷ 420] x 100 = 38.1%
Formula
Percentage change = [(580 - 420) / 420] x 100
Subtract the new number by the original number
580 - 420 = 160
160 ÷ 420 = 0.38095238095238093
0.38095238095238093 x 100 = 38.1%