-1.1% is the change from 729 to 721
Calculation steps:
[( 721 - 729 ) ÷ 729] x 100 = -1.1%
Formula
Percentage change = [(721 - 729) / 729] x 100
Subtract the new number by the original number
721 - 729 = -8
-8 ÷ 729 = -0.010973936899862825
-0.010973936899862825 x 100 = -1.1%