-0.92% is the change from 649 to 643
Calculation steps:
[( 643 - 649 ) ÷ 649] x 100 = -0.92%
Formula
Percentage change = [(643 - 649) / 649] x 100
Subtract the new number by the original number
643 - 649 = -6
-6 ÷ 649 = -0.009244992295839754
-0.009244992295839754 x 100 = -0.92%