445% is the change from 20 to 109
Calculation steps:
[( 109 - 20 ) ÷ 20] x 100 = 445%
Formula
Percentage change = [(109 - 20) / 20] x 100
Subtract the new number by the original number
109 - 20 = 89
89 ÷ 20 = 4.45
4.45 x 100 = 445%
Example