450% is the change from 20 to 110
Calculation steps:
[( 110 - 20 ) ÷ 20] x 100 = 450%
Formula
Percentage change = [(110 - 20) / 20] x 100
Subtract the new number by the original number
110 - 20 = 90
90 ÷ 20 = 4.5
4.5 x 100 = 450%
Example