-48.69% is the change from 990 to 508
Calculation steps:
[( 508 - 990 ) ÷ 990] x 100 = -48.69%
Formula
Percentage change = [(508 - 990) / 990] x 100
Subtract the new number by the original number
508 - 990 = -482
-482 ÷ 990 = -0.4868686868686869
-0.4868686868686869 x 100 = -48.69%