-52.02% is the change from 990 to 475
Calculation steps:
[( 475 - 990 ) ÷ 990] x 100 = -52.02%
Formula
Percentage change = [(475 - 990) / 990] x 100
Subtract the new number by the original number
475 - 990 = -515
-515 ÷ 990 = -0.5202020202020202
-0.5202020202020202 x 100 = -52.02%