2370% is the change from 20 to 494
Calculation steps:
[( 494 - 20 ) ÷ 20] x 100 = 2370%
Formula
Percentage change = [(494 - 20) / 20] x 100
Subtract the new number by the original number
494 - 20 = 474
474 ÷ 20 = 23.7
23.7 x 100 = 2370%
Example