2345% is the change from 20 to 489
Calculation steps:
[( 489 - 20 ) ÷ 20] x 100 = 2345%
Formula
Percentage change = [(489 - 20) / 20] x 100
Subtract the new number by the original number
489 - 20 = 469
469 ÷ 20 = 23.45
23.45 x 100 = 2345%
Example