-0.77% is the change from 649 to 644
Calculation steps:
[( 644 - 649 ) ÷ 649] x 100 = -0.77%
Formula
Percentage change = [(644 - 649) / 649] x 100
Subtract the new number by the original number
644 - 649 = -5
-5 ÷ 649 = -0.007704160246533128
-0.007704160246533128 x 100 = -0.77%