2290% is the change from 20 to 478
Calculation steps:
[( 478 - 20 ) ÷ 20] x 100 = 2290%
Formula
Percentage change = [(478 - 20) / 20] x 100
Subtract the new number by the original number
478 - 20 = 458
458 ÷ 20 = 22.9
22.9 x 100 = 2290%
Example