2390% is the change from 20 to 498
Calculation steps:
[( 498 - 20 ) ÷ 20] x 100 = 2390%
Formula
Percentage change = [(498 - 20) / 20] x 100
Subtract the new number by the original number
498 - 20 = 478
478 ÷ 20 = 23.9
23.9 x 100 = 2390%
Example