-1.4% is the change from 642 to 633
Calculation steps:
[( 633 - 642 ) ÷ 642] x 100 = -1.4%
Formula
Percentage change = [(633 - 642) / 642] x 100
Subtract the new number by the original number
633 - 642 = -9
-9 ÷ 642 = -0.014018691588785047
-0.014018691588785047 x 100 = -1.4%