3520% is the change from 20 to 724
Calculation steps:
[( 724 - 20 ) ÷ 20] x 100 = 3520%
Formula
Percentage change = [(724 - 20) / 20] x 100
Subtract the new number by the original number
724 - 20 = 704
704 ÷ 20 = 35.2
35.2 x 100 = 3520%
Example