2395% is the change from 20 to 499
Calculation steps:
[( 499 - 20 ) ÷ 20] x 100 = 2395%
Formula
Percentage change = [(499 - 20) / 20] x 100
Subtract the new number by the original number
499 - 20 = 479
479 ÷ 20 = 23.95
23.95 x 100 = 2395%
Example