-1.37% is the change from 657 to 648
Calculation steps:
[( 648 - 657 ) ÷ 657] x 100 = -1.37%
Formula
Percentage change = [(648 - 657) / 657] x 100
Subtract the new number by the original number
648 - 657 = -9
-9 ÷ 657 = -0.0136986301369863
-0.0136986301369863 x 100 = -1.37%