105% is the change from 20 to 41
Calculation steps:
[( 41 - 20 ) ÷ 20] x 100 = 105%
Formula
Percentage change = [(41 - 20) / 20] x 100
Subtract the new number by the original number
41 - 20 = 21
21 ÷ 20 = 1.05
1.05 x 100 = 105%
Example