-3.65% is the change from 685 to 660
Calculation steps:
[( 660 - 685 ) ÷ 685] x 100 = -3.65%
Formula
Percentage change = [(660 - 685) / 685] x 100
Subtract the new number by the original number
660 - 685 = -25
-25 ÷ 685 = -0.0364963503649635
-0.0364963503649635 x 100 = -3.65%