-9.99% is the change from 721 to 649
Calculation steps:
[( 649 - 721 ) ÷ 721] x 100 = -9.99%
Formula
Percentage change = [(649 - 721) / 721] x 100
Subtract the new number by the original number
649 - 721 = -72
-72 ÷ 721 = -0.09986130374479889
-0.09986130374479889 x 100 = -9.99%