2250% is the change from 20 to 470
Calculation steps:
[( 470 - 20 ) ÷ 20] x 100 = 2250%
Formula
Percentage change = [(470 - 20) / 20] x 100
Subtract the new number by the original number
470 - 20 = 450
450 ÷ 20 = 22.5
22.5 x 100 = 2250%
Example