-2.47% is the change from 649 to 633
Calculation steps:
[( 633 - 649 ) ÷ 649] x 100 = -2.47%
Formula
Percentage change = [(633 - 649) / 649] x 100
Subtract the new number by the original number
633 - 649 = -16
-16 ÷ 649 = -0.02465331278890601
-0.02465331278890601 x 100 = -2.47%