-5.4% is the change from 685 to 648
Calculation steps:
[( 648 - 685 ) ÷ 685] x 100 = -5.4%
Formula
Percentage change = [(648 - 685) / 685] x 100
Subtract the new number by the original number
648 - 685 = -37
-37 ÷ 685 = -0.05401459854014599
-0.05401459854014599 x 100 = -5.4%