-68.89% is the change from 990 to 308
Calculation steps:
[( 308 - 990 ) ÷ 990] x 100 = -68.89%
Formula
Percentage change = [(308 - 990) / 990] x 100
Subtract the new number by the original number
308 - 990 = -682
-682 ÷ 990 = -0.6888888888888889
-0.6888888888888889 x 100 = -68.89%