-48.18% is the change from 990 to 513
Calculation steps:
[( 513 - 990 ) ÷ 990] x 100 = -48.18%
Formula
Percentage change = [(513 - 990) / 990] x 100
Subtract the new number by the original number
513 - 990 = -477
-477 ÷ 990 = -0.4818181818181818
-0.4818181818181818 x 100 = -48.18%