-47.58% is the change from 990 to 519
Calculation steps:
[( 519 - 990 ) ÷ 990] x 100 = -47.58%
Formula
Percentage change = [(519 - 990) / 990] x 100
Subtract the new number by the original number
519 - 990 = -471
-471 ÷ 990 = -0.47575757575757577
-0.47575757575757577 x 100 = -47.58%