-1.85% is the change from 649 to 637
Calculation steps:
[( 637 - 649 ) ÷ 649] x 100 = -1.85%
Formula
Percentage change = [(637 - 649) / 649] x 100
Subtract the new number by the original number
637 - 649 = -12
-12 ÷ 649 = -0.01848998459167951
-0.01848998459167951 x 100 = -1.85%