-6.73% is the change from 773 to 721
Calculation steps:
[( 721 - 773 ) ÷ 773] x 100 = -6.73%
Formula
Percentage change = [(721 - 773) / 773] x 100
Subtract the new number by the original number
721 - 773 = -52
-52 ÷ 773 = -0.06727037516170763
-0.06727037516170763 x 100 = -6.73%