2485% is the change from 20 to 517
Calculation steps:
[( 517 - 20 ) ÷ 20] x 100 = 2485%
Formula
Percentage change = [(517 - 20) / 20] x 100
Subtract the new number by the original number
517 - 20 = 497
497 ÷ 20 = 24.85
24.85 x 100 = 2485%
Example