-2.63% is the change from 646 to 629
Calculation steps:
[( 629 - 646 ) ÷ 646] x 100 = -2.63%
Formula
Percentage change = [(629 - 646) / 646] x 100
Subtract the new number by the original number
629 - 646 = -17
-17 ÷ 646 = -0.02631578947368421
-0.02631578947368421 x 100 = -2.63%