-2.63% is the change from 685 to 667
Calculation steps:
[( 667 - 685 ) ÷ 685] x 100 = -2.63%
Formula
Percentage change = [(667 - 685) / 685] x 100
Subtract the new number by the original number
667 - 685 = -18
-18 ÷ 685 = -0.026277372262773723
-0.026277372262773723 x 100 = -2.63%