-2.62% is the change from 687 to 669
Calculation steps:
[( 669 - 687 ) ÷ 687] x 100 = -2.62%
Formula
Percentage change = [(669 - 687) / 687] x 100
Subtract the new number by the original number
669 - 687 = -18
-18 ÷ 687 = -0.026200873362445413
-0.026200873362445413 x 100 = -2.62%