2170% is the change from 20 to 454
Calculation steps:
[( 454 - 20 ) ÷ 20] x 100 = 2170%
Formula
Percentage change = [(454 - 20) / 20] x 100
Subtract the new number by the original number
454 - 20 = 434
434 ÷ 20 = 21.7
21.7 x 100 = 2170%
Example