4.76% is the change from 420 to 440
Calculation steps:
[( 440 - 420 ) ÷ 420] x 100 = 4.76%
Formula
Percentage change = [(440 - 420) / 420] x 100
Subtract the new number by the original number
440 - 420 = 20
20 ÷ 420 = 0.047619047619047616
0.047619047619047616 x 100 = 4.76%