-41.72% is the change from 990 to 577
Calculation steps:
[( 577 - 990 ) ÷ 990] x 100 = -41.72%
Formula
Percentage change = [(577 - 990) / 990] x 100
Subtract the new number by the original number
577 - 990 = -413
-413 ÷ 990 = -0.4171717171717172
-0.4171717171717172 x 100 = -41.72%