-43.74% is the change from 990 to 557
Calculation steps:
[( 557 - 990 ) ÷ 990] x 100 = -43.74%
Formula
Percentage change = [(557 - 990) / 990] x 100
Subtract the new number by the original number
557 - 990 = -433
-433 ÷ 990 = -0.43737373737373736
-0.43737373737373736 x 100 = -43.74%