-0.62% is the change from 649 to 645
Calculation steps:
[( 645 - 649 ) ÷ 649] x 100 = -0.62%
Formula
Percentage change = [(645 - 649) / 649] x 100
Subtract the new number by the original number
645 - 649 = -4
-4 ÷ 649 = -0.0061633281972265025
-0.0061633281972265025 x 100 = -0.62%