-1.56% is the change from 643 to 633
Calculation steps:
[( 633 - 643 ) ÷ 643] x 100 = -1.56%
Formula
Percentage change = [(633 - 643) / 643] x 100
Subtract the new number by the original number
633 - 643 = -10
-10 ÷ 643 = -0.015552099533437015
-0.015552099533437015 x 100 = -1.56%