-1.34% is the change from 672 to 663
Calculation steps:
[( 663 - 672 ) ÷ 672] x 100 = -1.34%
Formula
Percentage change = [(663 - 672) / 672] x 100
Subtract the new number by the original number
663 - 672 = -9
-9 ÷ 672 = -0.013392857142857142
-0.013392857142857142 x 100 = -1.34%