-2.34% is the change from 685 to 669
Calculation steps:
[( 669 - 685 ) ÷ 685] x 100 = -2.34%
Formula
Percentage change = [(669 - 685) / 685] x 100
Subtract the new number by the original number
669 - 685 = -16
-16 ÷ 685 = -0.02335766423357664
-0.02335766423357664 x 100 = -2.34%