-44.44% is the change from 990 to 550
Calculation steps:
[( 550 - 990 ) ÷ 990] x 100 = -44.44%
Formula
Percentage change = [(550 - 990) / 990] x 100
Subtract the new number by the original number
550 - 990 = -440
-440 ÷ 990 = -0.4444444444444444
-0.4444444444444444 x 100 = -44.44%