-30.4% is the change from 990 to 689
Calculation steps:
[( 689 - 990 ) ÷ 990] x 100 = -30.4%
Formula
Percentage change = [(689 - 990) / 990] x 100
Subtract the new number by the original number
689 - 990 = -301
-301 ÷ 990 = -0.30404040404040406
-0.30404040404040406 x 100 = -30.4%