-2.17% is the change from 737 to 721
Calculation steps:
[( 721 - 737 ) ÷ 737] x 100 = -2.17%
Formula
Percentage change = [(721 - 737) / 737] x 100
Subtract the new number by the original number
721 - 737 = -16
-16 ÷ 737 = -0.021709633649932156
-0.021709633649932156 x 100 = -2.17%