-10.69% is the change from 720 to 643
Calculation steps:
[( 643 - 720 ) ÷ 720] x 100 = -10.69%
Formula
Percentage change = [(643 - 720) / 720] x 100
Subtract the new number by the original number
643 - 720 = -77
-77 ÷ 720 = -0.10694444444444444
-0.10694444444444444 x 100 = -10.69%