11.9% is the change from 420 to 470
Calculation steps:
[( 470 - 420 ) ÷ 420] x 100 = 11.9%
Formula
Percentage change = [(470 - 420) / 420] x 100
Subtract the new number by the original number
470 - 420 = 50
50 ÷ 420 = 0.11904761904761904
0.11904761904761904 x 100 = 11.9%