-40.51% is the change from 990 to 589
Calculation steps:
[( 589 - 990 ) ÷ 990] x 100 = -40.51%
Formula
Percentage change = [(589 - 990) / 990] x 100
Subtract the new number by the original number
589 - 990 = -401
-401 ÷ 990 = -0.40505050505050505
-0.40505050505050505 x 100 = -40.51%
Example