420% is the change from 20 to 104
Calculation steps:
[( 104 - 20 ) ÷ 20] x 100 = 420%
Formula
Percentage change = [(104 - 20) / 20] x 100
Subtract the new number by the original number
104 - 20 = 84
84 ÷ 20 = 4.2
4.2 x 100 = 420%
Example