-2.83% is the change from 742 to 721
Calculation steps:
[( 721 - 742 ) ÷ 742] x 100 = -2.83%
Formula
Percentage change = [(721 - 742) / 742] x 100
Subtract the new number by the original number
721 - 742 = -21
-21 ÷ 742 = -0.02830188679245283
-0.02830188679245283 x 100 = -2.83%