3540% is the change from 20 to 728
Calculation steps:
[( 728 - 20 ) ÷ 20] x 100 = 3540%
Formula
Percentage change = [(728 - 20) / 20] x 100
Subtract the new number by the original number
728 - 20 = 708
708 ÷ 20 = 35.4
35.4 x 100 = 3540%
Example