3950% is the change from 18 to 729
Calculation steps:
[( 729 - 18 ) ÷ 18] x 100 = 3950%
Formula
Percentage change = [(729 - 18) / 18] x 100
Subtract the new number by the original number
729 - 18 = 711
711 ÷ 18 = 39.5
39.5 x 100 = 3950%
Example