-43.64% is the change from 990 to 558
Calculation steps:
[( 558 - 990 ) ÷ 990] x 100 = -43.64%
Formula
Percentage change = [(558 - 990) / 990] x 100
Subtract the new number by the original number
558 - 990 = -432
-432 ÷ 990 = -0.43636363636363634
-0.43636363636363634 x 100 = -43.64%