5% is the change from 420 to 441
Calculation steps:
[( 441 - 420 ) ÷ 420] x 100 = 5%
Formula
Percentage change = [(441 - 420) / 420] x 100
Subtract the new number by the original number
441 - 420 = 21
21 ÷ 420 = 0.05
0.05 x 100 = 5%
Example