-16.82% is the change from 773 to 643
Calculation steps:
[( 643 - 773 ) ÷ 773] x 100 = -16.82%
Formula
Percentage change = [(643 - 773) / 773] x 100
Subtract the new number by the original number
643 - 773 = -130
-130 ÷ 773 = -0.16817593790426907
-0.16817593790426907 x 100 = -16.82%