-6.25% is the change from 672 to 630
Calculation steps:
[( 630 - 672 ) ÷ 672] x 100 = -6.25%
Formula
Percentage change = [(630 - 672) / 672] x 100
Subtract the new number by the original number
630 - 672 = -42
-42 ÷ 672 = -0.0625
-0.0625 x 100 = -6.25%