-0.32% is the change from 632 to 630
Calculation steps:
[( 630 - 632 ) ÷ 632] x 100 = -0.32%
Formula
Percentage change = [(630 - 632) / 632] x 100
Subtract the new number by the original number
630 - 632 = -2
-2 ÷ 632 = -0.0031645569620253164
-0.0031645569620253164 x 100 = -0.32%