-41.52% is the change from 990 to 579
Calculation steps:
[( 579 - 990 ) ÷ 990] x 100 = -41.52%
Formula
Percentage change = [(579 - 990) / 990] x 100
Subtract the new number by the original number
579 - 990 = -411
-411 ÷ 990 = -0.41515151515151516
-0.41515151515151516 x 100 = -41.52%