-2.17% is the change from 646 to 632
Calculation steps:
[( 632 - 646 ) ÷ 646] x 100 = -2.17%
Formula
Percentage change = [(632 - 646) / 646] x 100
Subtract the new number by the original number
632 - 646 = -14
-14 ÷ 646 = -0.021671826625386997
-0.021671826625386997 x 100 = -2.17%