1702.5% is the change from 40 to 721
Calculation steps:
[( 721 - 40 ) ÷ 40] x 100 = 1702.5%
Formula
Percentage change = [(721 - 40) / 40] x 100
Subtract the new number by the original number
721 - 40 = 681
681 ÷ 40 = 17.025
17.025 x 100 = 1702.5%
Example