2340% is the change from 20 to 488
Calculation steps:
[( 488 - 20 ) ÷ 20] x 100 = 2340%
Formula
Percentage change = [(488 - 20) / 20] x 100
Subtract the new number by the original number
488 - 20 = 468
468 ÷ 20 = 23.4
23.4 x 100 = 2340%
Example