-2.9% is the change from 689 to 669
Calculation steps:
[( 669 - 689 ) ÷ 689] x 100 = -2.9%
Formula
Percentage change = [(669 - 689) / 689] x 100
Subtract the new number by the original number
669 - 689 = -20
-20 ÷ 689 = -0.02902757619738752
-0.02902757619738752 x 100 = -2.9%