39.52% is the change from 420 to 586
Calculation steps:
[( 586 - 420 ) ÷ 420] x 100 = 39.52%
Formula
Percentage change = [(586 - 420) / 420] x 100
Subtract the new number by the original number
586 - 420 = 166
166 ÷ 420 = 0.3952380952380952
0.3952380952380952 x 100 = 39.52%